The Use of the Voice Trainer App for Vocal Control in People with a Degenerative Ataxia: A Pilot Intervention Study.

Dysarthria is disabling in persons with degenerative ataxia. There is limited evidence for speech therapy interventions. In this pilot study, we used the Voice trainer app, which was originally developed for patients with Parkinson's disease, as a feedback tool for vocal control. We hypothesized that patients with ataxic dysarthria would benefit from the Voice trainer app to better control their loudness and pitch, resulting in a lower speaking rate and better intelligibility. This intervention study consisted of five therapy sessions of 30 min within 3 weeks using the principles of the Pitch Limiting Voice Treatment. Patients received real-time visual feedback on loudness and pitch during the exercises. Besides, they were encouraged to practice at home or to use the Voice trainer in daily life. We used observer-rated and patient-rated outcome measures. The primary outcome measure was intelligibility, as measured by the Dutch sentence intelligibility test. Twenty-one out of 25 included patients with degenerative ataxia completed the therapy. We found no statistically significant improvements in intelligibility (p = .56). However, after the intervention, patients were speaking slower (p = .03) and the pause durations were longer (p < .001). The patients were satisfied about using the app. At the group level, we found no evidence for an effect of the Voice trainer app on intelligibility in degenerative ataxia. Because of the heterogeneity of ataxic dysarthria, a more tailor-made rather than generic intervention seems warranted.

Clinical effectiveness of telerehabilitation in voice therapy programs for dysphonia.

PURPOSE: The main aim of this study was to investigate the clinical efficacy of speech therapy, delivered via tele-practice to patients with dysphonia. A secondary aim was to verify whether a telerehabilitation-only protocol could have a clinical efficacy similar to a combined telerehabilitation and in-person approach. METHODS: Thirty-two consecutive patients undergoing telerehabilitation for dysphonia were retrospectively considered. Patients were divided into two groups: those who received combined in-person and telerehabilitation treatment, and those who underwent telerehabilitation only. RESULTS: Overall, patients included in this study showed a significant improvement in their VHI-10 scores after treatment (p < 0.001). Such an improvement was also significant in both combined therapy and telerehabilitation only groups (p = 0.019, and p = 0.002, respectively). A significant reduction in general degree of dysphonia (G), roughness (R), breathiness (B) and strain (S) scores (p < 0.001, p = 0.012, p < 0.001, and p < 0.001, respectively) was noticed over the whole sample after treatment. The same parameters showed a significant improvement also in the combined therapy group, while in the telerehabilitation only group, only G, B and S scores significantly improved. Mean phonation time, Jitter and Shimmer values significantly improved in the overall sample as well as in the combined therapy group. A significantly more favorable spectrographic class relative to the vowel /a/ was found after treatment in the whole sample, as well as in both combined therapy and telerehabilitation only groups (p < 0.001, p = 0.002, p = 0.004, respectively). CONCLUSION: This study's results seem to support telerehabilitation as a potentially effective tool to administer speech therapy in dysphonic patients, both as a single modality and in combination with traditional in-person sessions. To better characterize the clinical results of telerehabilitation in dysphonia treatment, large-scale prospective investigations are mandatory.

The impact of PD Check-In on self-management skills for maintenance of speech after intensive treatment.

BACKGROUND: Maintenance of speech outcomes following speech-language therapy (SLT) in Parkinson's disease (PD) is an unmet expectation of people with PD (PWPD) and poorly defined in SLT practice. PD Check-In, a model for supported self-managed maintenance of speech following Lee Silverman Voice Treatment (LSVT) LOUD was investigated. AIMS: To investigate the impact of the semi-structured component of PD Check-In on the adoption of self-management concepts and behaviours and the identification of facilitators, barriers and strategies for speech maintenance by PWPD over 24 months post-treatment. METHODS AND PROCEDURE: Following LSVT LOUD, 16 PWPD participated in individual PD Check-In semi-structured discussions with a SLT at 6 and 12 weeks, and 6, 12 and 24 months post treatment. A two-stage qualitative content analysis was applied: directed content analysis using categories from the theoretical framework of PD Check-In followed by inductive content analysis to identify subcategories. OUTCOMES AND RESULTS: Statements from PWPD indicated adoption of seven concepts of self-management across participants and across time. Six concepts from the theoretical framework of PD Check-In (partnerships, self-reflection, maintenance barriers and facilitators, revision of LSVT LOUD skill, goal setting and maintenance strategies), and one new category, participation, emerged from the analysis. Self-reflection, maintenance facilitators and barriers and participation were most prevalent in discussions. PWPD identified facilitators, barriers and strategies for maintenance across time points. CONCLUSIONS AND IMPLICATIONS: Statements from PWPD indicated a positive impact of SLT-supported self-management of speech using self-tailored strategies for sustainable maintenance according to their individual circumstances and needs. WHAT THIS PAPER ADDS: What is already known on this subject People with Parkinson's disease (PWPD) have expressed their need for speech-language therapy (SLT) services that are accessible for the duration of the condition and responsive to their expectation of maintaining speech following treatment. Outcomes for maintenance of the treatment effect following Lee Silverman Voice Treatment (LSVT) LOUD are variable. What this paper adds to existing knowledge This study presents the outcomes of five PD Check-In interventions delivered in semi-structured discussions between PWPD and a SLT over 24 months following LSVT LOUD for the development of self-management skills and behaviours. PWPD adopted self-management positively using self-tailored strategies for sustainable maintenance according to their individual circumstances and needs. What are the potential or actual clinical implications of this work? PWPD responded positively to the individual development of self-management skills and behaviours over time. Individuality and flexible responsivity are features of PD Check-In which resonate with PWPD and speak to SLT supported self-managed maintenance of speech as a long-term model for PD.

Immediate Effects of Semi-Occluded Vocal Tract Exercises on Acoustic, Auditory-Perceptual, and Self-Perceptual Measures of Voice Production.

INTRODUCTION: This study examined the immediate acoustic, auditory-perceptual, and self-perceptual effects of two semi-occluded vocal tract exercises (SOVTs): straw phonation and straw phonation into a cup of water, delivered in a remote setting. METHOD: Thirty-six participants (19 females and 17 males) completed a baseline battery of acoustic recordings, followed by one of two SOVTs, and an identical post-task battery. The procedure repeated itself to include the other SOVT. Participants were also asked to rate their self-perceived vocal effort and quality following each condition. Recordings were presented to three expert listeners for completion of auditory-perceptual analysis. RESULTS: Acoustically, a significant decrease in shimmer was noted following straw phonation. Auditory-perceptual analysis revealed a significant increase in the perception of strain following straw phonation into a cup of water. While no significant differences were found between SOVT tasks in self-perception of vocal effort, a significant increase in self-perception of vocal loudness was reported following straw phonation into a cup of water. CONCLUSION: SOVTs have a varied, yet significant short-term impact across acoustic, auditory-perceptual, and self-perceptual measures of voice production. Straw phonation provided consistently significant acoustic results, with nearly every variable improving to some degree. Results also support the notion that shimmer is an acoustic measure that is particularly susceptible to change following modest manipulation. These results, in addition to the auditory-perceptual and self-perceptual findings, have a direct impact on how SOVTs are being used clinically and may generalize to inform the way voice metrics are collected and analyzed.

Short Implicit Voice Training Affects Listening Effort During a Voice Cue Sensitivity Task With Vocoder-Degraded Speech.

OBJECTIVES: Understanding speech in real life can be challenging and effortful, such as in multiple-talker listening conditions. Fundamental frequency ( fo ) and vocal-tract length ( vtl ) voice cues can help listeners segregate between talkers, enhancing speech perception in adverse listening conditions. Previous research showed lower sensitivity to fo and vtl voice cues when speech signal was degraded, such as in cochlear implant hearing and vocoder-listening compared to normal hearing, likely contributing to difficulties in understanding speech in adverse listening. Nevertheless, when multiple talkers are present, familiarity with a talker's voice, via training or exposure, could provide a speech intelligibility benefit. In this study, the objective was to assess how an implicit short-term voice training could affect perceptual discrimination of voice cues ( fo+vtl ), measured in sensitivity and listening effort, with or without vocoder degradations. DESIGN: Voice training was provided via listening to a recording of a book segment for approximately 30 min, and answering text-related questions, to ensure engagement. Just-noticeable differences (JNDs) for fo+vtl were measured with an odd-one-out task implemented as a 3-alternative forced-choice adaptive paradigm, while simultaneously collecting pupil data. The reference voice either belonged to the trained voice or an untrained voice. Effects of voice training (trained and untrained voice), vocoding (non-vocoded and vocoded), and item variability (fixed or variable consonant-vowel triplets presented across three items) on voice cue sensitivity ( fo+vtl JNDs) and listening effort (pupillometry measurements) were analyzed. RESULTS: Results showed that voice training did not have a significant effect on voice cue discrimination. As expected, fo+vtl JNDs were significantly larger for vocoded conditions than for non-vocoded conditions and with variable item presentations than fixed item presentations. Generalized additive mixed models analysis of pupil dilation over the time course of stimulus presentation showed that pupil dilation was significantly larger during fo+vtl discrimination while listening to untrained voices compared to trained voices, but only for vocoder-degraded speech. Peak pupil dilation was significantly larger for vocoded conditions compared to non-vocoded conditions and variable items increased the pupil baseline relative to fixed items, which could suggest a higher anticipated task difficulty. CONCLUSIONS: In this study, even though short voice training did not lead to improved sensitivity to small fo+vtl voice cue differences at the discrimination threshold level, voice training still resulted in reduced listening effort for discrimination among vocoded voice cues.

The role of patient perceptions and hyperfunctional voice disorders in predicting voice therapy attendance.

OBJECTIVES/HYPOTHESIS: Attendance is essential to voice therapy's effectiveness in the treatment of voice and laryngeal disorders. With such high rates of drop-out and non-attendance, it is important to understand the factors that influence this behavior. This study sought to identify potential predictors of attendance to voice therapy at an interdisciplinary voice clinic. STUDY DESIGN: Single-institution retrospective cohort study. METHODS: In this retrospective cohort study, patients evaluated at an interdisciplinary voice clinic who received a referral for voice therapy were identified. Age, gender, voice-related diagnoses, Voice Handicap Index-10 scores, Reflux Symptom Index scores, and measures of patient perceptions (self-rated severity, importance of voice in one's life, and "feelings about voice therapy") were recorded to evaluate associations with attendance to at least one therapy session. Standard statistical analysis and logistic regressions were performed. RESULTS: Of 168 subjects included, 111 (66.1 %) attended at least one session of voice therapy. Patients diagnosed with primary hyperfunctional voice disorders had a significantly higher attendance rate than other groups. Attenders had higher self-ratings of severity and more positive "feelings about voice therapy" compared to non-attenders. Regression models found three significant predictors of therapy attendance: primary diagnosis of hyperfunctional voice disorder, self-rated severity, and "feelings about voice therapy." CONCLUSION: In this cohort, patients with more positive feelings about voice therapy, higher self-rated severity, and a diagnosis of primary hyperfunctional voice disorder were more likely to attend voice therapy.

COVID-related dysphonia and persistent long-COVID voice sequelae: A systematic review and meta-analysis.

PURPOSE: Dysphonia is a common symptom due to the coronavirus disease of the 2019 (COVID-19) infection. Nonetheless, it is often underestimated for its impact on human's health. We conducted this first study to investigate the global prevalence of COVID-related dysphonia as well as related clinical factors during acute COVID-19 infection, and after a mid- to long-term follow-up following the recovery. METHODS: Five electronic databases including PubMed, Embase, ScienceDirect, the Cochrane Library, and Web of Science were systematically searched for relevant articles until Dec, 2022, and the reference of the enrolled studies were also reviewed. Dysphonia prevalence during and after COVID-19 infection, and voice-related clinical factors were analyzed; the random-effects model was adopted for meta-analysis. The one-study-removal method was used for sensitivity analysis. Publication bias was determined with funnel plots and Egger's tests. RESULTS: Twenty-one articles comprising 13,948 patients were identified. The weighted prevalence of COVID-related dysphonia during infection was 25.1 % (95 % CI: 14.9 to 39.0 %), and male was significantly associated with lower dysphonia prevalence (coefficients: -0.116, 95 % CI: -0.196 to -0.036; P = .004) during this period. Besides, after recovery, the weighted prevalence of COVID-related dysphonia declined to 17.1 % (95 % CI: 11.0 to 25.8 %). 20.1 % (95 % CI: 8.6 to 40.2 %) of the total patients experienced long-COVID dysphonia. CONCLUSIONS: A quarter of the COVID-19 patients, especially female, suffered from voice impairment during infection, and approximately 70 % of these dysphonic patients kept experiencing long-lasting voice sequelae, which should be noticed by global physicians.

The effect of voice training interventions on patients with oropharyngeal dysphagia: a systematic review.

BACKGROUND: Voice training has been proposed as an intervention to improve swallowing function in patients with dysphagia. However, little is known about the effects of voice training on swallowing physiology. OBJECTIVES: This systematic review investigates the effect of voice training on the swallowing function of patients with oropharyngeal dysphagia and provides the theoretical basis for improving the swallowing function and life quality of patients with oropharyngeal dysphagia. DATA SOURCES: A systematic review using a narrative synthesis approach of all published studies was sought with no date restrictions. Five electronic databases (EMBASE, PubMed, CINAHL, Web of Science, and The Cochrane Library) were searched from inception to April 2022. STUDY SELECTION: Eight studies were included. Two researchers screened the literature according to inclusion and exclusion criteria, extracted data, and carried out quality control according to the Cochrane handbook5.1.0. Data were analyzed narratively and descriptively. CONCLUSIONS: In general, statistically significant positive therapy effects were found. Voice training improves the oral and pharyngeal stages of swallowing in patients with neurological causes of dysphagia, such as stroke, and in patients with non-neurological causes of dysphagia, such as head and neck cancer. However, the current literature is limited and further primary research is required to provide more evidence to support voice training intervention in dysphagia.  Future studies could  further refine the content of voice training interventions, increase the number of patients enrolled, assess the long-term effects of voice training interventions and add associated assessments of the quality of life after treatment.

Immediate effects of straw phonation in air or water on the laryngeal function and configuration of female speech-language pathology students visualised with strobovideolaryngoscopy: A randomised controlled trial.

BACKGROUND: A promising way to obtain vocal economy and efficiency is by semi-occluding the vocal tract while phonating. Current knowledge about the immediate effects of semi-occluded vocal tract (SOVT) phonation on the laryngeal function and configuration is based mainly on computer modelling or excised larynges studies. In in vivo SOVT studies, electroglottography (EGG) has been the most commonly used laryngeal outcome, showing contradictory results between studies. Therefore, exploring these aspects by direct visualisation of the human larynx during SOVT phonation using strobovideolaryngoscopy (SVL) is needed. AIMS: The aim of this study was to investigate and compare the immediate effects of straw phonation (SP) in air, SP in 2 cm water, and SP in 5 cm water (with stirring straws), on the laryngeal function and configuration of a homogeneous group of vocally healthy female speech-language pathology students, visualised with flexible SVL. METHODS & PROCEDURE: A randomised controlled trial was used. Fifty-two female speech-language pathology students (mean age: 18.7 years, SD: 0.6) were assigned randomly to one of three experimental groups or a control group: (1) SP in air, (2) SP in 2 cm water, (3) SP in 5 cm water or (4) [u] phonation with similar soft onset and slightly pursed lips as in SP but without a straw (control group). The participants underwent flexible SVL during habitual [u] phonation, followed by the specific SOVT exercise of their group assignment. All video samples were evaluated randomly and blindly by two experienced investigators using the Voice-Vibratory Assessment with Laryngeal Imaging (VALI) rating form, first independently and then by consensus. OUTCOME & RESULTS: Compared to habitual phonation, the vibrational amplitude decreased during SP in 5 cm water and SP in 2 cm water, being more prominent in the first, more flow-resistant exercise. The mucosal wave also decreased during SP in 5 cm water. The anteroposterior (AP) supraglottic compression similarly increased during SP in air, SP in 2 cm water, and SP in 5 cm water. Further, a rise in mediolateral (ML) compression and a decrease in phase symmetry and regularity were found during SP in 2 cm water. A similar decrease in regularity was observed during SP in 5 cm water. CONCLUSIONS & IMPLICATIONS: Both SP in air and SP in water cause positive immediate laryngeal effects for voice training opportunities. More AP supraglottic activity found during each SP exercise might indicate epilarynx narrowing, an economic phenomenon associated with SOVT. Immersing the straw in water additionally diminished the vibrational amplitude, lowering vocal fold impact stress and risk for phonotrauma during the exercise. The decreased regularity of the vibrational cycles during SP in water might be due to the varying back pressure created by the water bubbling. The impact of SP in water on ML supraglottic compression needs further investigation. WHAT THIS PAPER ADDS: What is already known on the subject A promising way to obtain vocal economy and efficiency is by semi-occluding the vocal tract while phonating. Current knowledge about the immediate effects of semi-occluded vocal tract (SOVT) phonation on the laryngeal function and configuration is based mainly on computer modelling or excised larynges studies. In in vivo SOVT studies, electroglottography (EGG) has been the most commonly used laryngeal outcome, showing contradictory results between studies. Therefore, exploring these aspects by direct visualisation of the human larynx during SOVT phonation using strobovideolaryngoscopy (SVL) is needed. What this paper adds to existing knowledge Group results of the current study generally support earlier computer modelling and in vivo studies, strengthening the current SOVT knowledge. Both SP in air and SP in water cause positive immediate laryngeal effects for voice training opportunities. More anteroposterior (AP) supraglottic activity found during each SP exercise might indicate epilarynx narrowing, an economic phenomenon associated with SOVT. Immersing the straw in water additionally diminished the vibrational amplitude, lowering vocal fold impact stress and risk for phonotrauma during the exercise. The decreased regularity of the vibrational cycles during SP in water might be due to the varying back pressure created by the water bubbling. The impact of SP in water on ML supraglottic compression needs further investigation. What are the potential or actual clinical implications of this work? Current results support that both SP in air and SP in water can be useful exercises in voice training. SP in water has shown the additional gain of lowering the vibrational amplitude during the exercise, hence supporting its appropriateness for vocal warm-ups by minimising vocal fold impact stress and the risk of phonotrauma. In the future, large-scale randomised controlled trials in other subgroups of voice users, including dysphonic patients, are needed to support evidence-based practice. SVL can facilitate the search for individualised training and therapy approaches.

Clinical outcomes of PD Check-In, a model for supported self-managed maintenance of speech in Parkinson's disease: A Phase 1 study.

BACKGROUND: For many people with Parkinson's disease (PWPD), the long-term maintenance of speech following intensive treatment remains elusive. PD Check-In, a model for supported self-managed maintenance of speech following LSVT LOUD® , was developed and evaluated. AIMS: To evaluate the impact of PD Check-In on vocal intensity and level of satisfaction of PWPD and their communication partners (CPs) over 24 months following LSVT LOUD. METHODS & PROCEDURES: A repeated-measures study design examined the impact of PD Check-In on the speech of 16 PWPD. Participants received LSVT LOUD followed by PD Check-In at 6 and 12 weeks, and 6, 12 and 24 months after treatment. Outcome measures included acoustic measures of vocal intensity (sound pressure level-SPL) during sustained phonation, functional phrases, reading, and monologue, and satisfaction questionnaires for PWPD and their CPs. OUTCOMES & RESULTS: A significant treatment effect for time (p < 0.01) was identified for all SPL variables. Planned comparisons showed significant improvements for each variable pre- to post-LSVT LOUD. There was a significant maintenance effect for SPL maximum sustained phonation only, post-LSVT LOUD to 24 months. SPL remained significantly above baseline for functional phrases and maximum sustained phonation at 24 months. Participants' satisfaction with PD Check-In was high, at 93.75% for PWPD and 79.99% for CPs, at 24 months post-treatment. Long intervals between appointments led PWPD to feel less motivated about speech practice but more confident in self-management. CONCLUSIONS & IMPLICATIONS: For PWPD and CPs, maintenance of speech following LSVT LOUD encompasses more than acoustic outcomes. WHAT THIS PAPER ADDS: What is already known on this subject? Maintenance of speech following LSVT LOUD has been shown to be variable in individual and group models. For PWPD and their CPs, a model for speech maintenance supports their expectation of sustained treatment effect over time and meets their changing needs for speech and language therapy services. Supported self-management is a model under investigation for long-term maintenance of speech. What this paper adds to existing knowledge? This study presents the impact of five individual PD Check-In interventions on the maintenance of vocal intensity (SPL) of 16 PWPD over 24 months following LSVT LOUD. PWPD and CPs reported a high level of satisfaction with PD Check-In independent of acoustic outcomes. What are the potential or actual clinical implications of this work? Participant satisfaction with PD Check-In is derived from multiple factors and not limited to acoustic outcomes post-LSVT LOUD. Further investigation of the efficacy of PD Check-In to support the perceived maintenance of speech of PWPD and CPs is warranted.

Amateur choir singers - Does good vocal health matter?

BACKGROUND: Many amateur singers enjoy singing in choirs. They are likely to lack the training and expertise of professional singers and this may have an impact on their vocal health. AIMS: To assess the experiences of amateur singers, their use of warm-up and cool-down sessions, their vocal health, their sources of help and advice and their reactions to receiving a diagnosis and treatment. METHODS AND PROCEDURES: A questionnaire was sent to amateur choir singers. Quantitative data on their use of warm-up and cool-down activities were collected and the singers rated how frequently they experienced adverse voice symptoms after singing. Qualitative data were collected from singers who had sought advice about their voice and from those who had received a diagnosis and treatment. OUTCOME AND RESULTS: Most choirs used warm-up sessions but few used cool-down. Singers who participated in choir warm-ups experienced significantly less vocal symptoms. Individual warm-ups were ineffective. Singers who had previously had a diagnosis continued to have significantly higher symptom scores. A quarter of the singers who had neither sought help nor had a diagnosis had high scores. Singers appeared uncertain about who to consult for help. Those who saw a speech and language therapist were much more likely to receive a diagnosis and treatment either by the therapist or by referral to an ear, nose and throat specialist. Those receiving treatment were mainly positive about it and likely to complete a course of therapy. CONCLUSIONS AND IMPLICATIONS: Warm-up sessions performed by choirs are helpful in avoiding voice symptoms and are recommended. The presence of singers who are unaware of potential damage to their voices is a concern. A simple rating system, as used in this research, may act to alert them to the dangers. Choir leaders could be more active in advising singers and refer them to professionals where necessary. Speech and language therapists appear more sensitive to their problems and could be a first point of contact. WHAT THIS PAPER ADDS: What is already known on this subject Poor vocal health may occur in amateur singers and lead to voice disorders which will reduce the demonstrated benefits of regular singing. They may be less aware than professional singers of potential hazards and may not know how to sing in a way that ensures good vocal health. There has been less research on the extent of voice problems in amateurs or of the actions they may take to resolve the vocal difficulties they encounter. What this paper adds to the existing knowledge This survey demonstrates that choir warm-ups were effective in helping to avoid common symptoms associated with voice problems. A large minority of singers who had not sought help for voice problems had high symptom scores on our assessment. Singers frequently turned to a singing teacher for help. Those who consulted a speech and language therapist were much more likely to be referred for further investigation and treatment. What are the potential or actual clinical implications of this work? We present a simple subjective measure of symptom severity which succeeds in distinguishing between singers who warm up their voices and those who do not and between singers who have received a past diagnosis and those who have not. There are a number of indications in this research that amateur singers are unsure if they need help and are uncertain who can offer it. In these circumstances the use of a simple measure of the severity of vocal abuse may be useful.

The maximum phonation time as marker for voice treatment efficacy: A network meta-analysis.

PURPOSE: There is a diversity in treatment approaches for voice therapy in which aerodynamic treatment effects between the approaches are lacking. The evidence of voice treatments on the maximum phonation time (MPT) was quantified using the statistical approach of a network meta-analysis (NMA). DATA SOURCES: Three databases and manual search from inception to November 2021 were evaluated. STUDY SELECTION: Studies were considered which were reports of randomised controlled/clinical trials (RCT) evaluating the efficacy of a specific voice therapy treatment using MPT as an outcome measure in adult participants with voice disorders. Studies were excluded if participants had been diagnosed with neurological-motor-speech disorders or who were vocally healthy. Furthermore, no medical, pharmacological, or technical instrumental treatments were used. DATA EXTRACTION AND SYNTHESIS: Preferred Reporting Items for systematic reviews and meta-analyses extension statement guidelines were followed. Two reviewers independently screened citations, extracted data, and assessed risk of bias using PEDro scale. Random effects model was used for meta-analysis. RESULTS: We identified finally 12 RCT studies (treatment groups n = 285, and control group without an intervention n = 62). Eight interventions were evaluated. The only effective intervention with a significant effect was vocal function exercises (VFE) (mean pre-post difference 6.16 s, 95% confidence interval, 1.18-11.13 s). CONCLUSIONS AND RELEVANCE: VFE effectively improved MPT from pre- to post-treatment in comparison with other voice interventions which were identified in the present NMA. Further high-quality intervention studies with large samples sizes, multidimensional measures, and homogeneous groups of dysphonia are needed to support evidence-based practice in laryngology.

Indirect Vocal Therapy as a Treatment Program for Behavioral Dysphonia: A Pilot Study.

INTRODUCTION: Indirect vocal therapy (IVT) has tools that aim to modify an individual's behavior, emotional factors, and physical environment for restoring vocal quality. Then, vocal health guidance may promote the desire for caring about the voice and prevent or treat behavioral dysphonia. However, studies that used parts of IVT have shown conflicting results. Hence, the main objective of this study was to introduce an IVT program based on the taxonomy of Van Stan et al. [Am J Speech Lang Pathol. 2015;24(2):101-25]. The second objective of this study was to analyze the preliminary effects of the IVT program on vocal comfort through the self-assessment of vocal fatigue, vocal symptoms, vocal handicap, and vocal quality in patients diagnosed with behavioral dysphonia. METHOD: This is an experimental, analytical, and prospective pilot study. Nine participants (five women; four men) aged between 18 and 50 years with behavioral dysphonia participated in this study. They underwent the IVT program with guidance about vocal health, general health, emotional factors, and motivation. The therapy was implemented twice per week, totalizing eight sessions, each lasting 35 min. Participants were assessed before therapy started (M1), after it ended (M2), and 1 month after as a follow-up (M3). As assessment, participants filled in the Vocal Fatigue Index (VFI), Voice Symptoms Scale (VoiSS), and Vocal Handicap Index-30 (VHI-30). Additionally, they had their voices recorded for acoustic measures (i.e., cepstral peak prominence-smoothed, alpha ratio, and L1-L0) and auditory-perceptual analysis using the GRBASI scale. RESULTS: The acoustic measures and auditory-perceptual analysis showed no significant differences between the assessment moments. The auditory-perceptual analysis showed a mild deviation in participants' vocal quality. The participants' scores of the VFI, VoiSS, and VHI were lower in M2 and remained lower in M3. CONCLUSION: The IVT program had positive results in voice-related self-assessment and vocal comfort. However, further studies are necessary to elucidate its effects on the vocal quality of participants with behavioral dysphonia.

[Troubleshooting with difficult replacement of voice prostheses and a novel retrograde procedure]. / Tipps und Tricks beim erschwerten Stimmprothesenwechsel und ein neues retrogrades Wechselverfahren.

The implantation of a voice prosthesis has become a standard procedure during a laryngectomy. A voice prostheses enables patients to develop speech shortly after surgery, which strongly improves rehabilitation and quality of life.The lifetime of a voice prosthesis is limited and highly variable due to different causes. A replacement is usually necessary several times a year and can easily been done in an outpatient setting with surface anesthesia. In some cases, replacing the prosthesis becomes difficult. This article will take a closer look at different reasons that can lead to difficulties in prostheses replacement and discuss possible solutions, thereby focusing especially on a retrograde technique. The aim of this article is to help colleagues that already have experience with voice prostheses and want to expand their therapeutic armamentarium.

Effects of voice rehabilitation in people with MS: A double-blinded long-term randomized controlled trial.

BACKGROUND: Hypophonia is a prevailing problem in people with multiple sclerosis (PwMS). However, evidence supporting the effectiveness of voice rehabilitation is lacking. OBJECTIVE: The aim of this study was to identify the most effective method to reduce hypophonia. METHODS: In this randomized controlled trial, 44 PwMS were randomized to intensive and high-effort voice treatment groups, the LSVT-LOUD®, and conventional treatment group. Subjects received 16 treatments (4 sessions/week) lasting 45 minutes. The primary outcome was voice intensity (dB) in monologue, vocalization, and sentences while voice handicap index (VHI) measured voice self-perception. Outcomes were assessed by a blinded observer at baseline, post-treatment, and 15-month follow-up (FU). RESULTS: Linear models revealed a significant post-intervention between-group mean difference in favor of LSVT-LOUD for monologue: +6.3 dB (95% CI: 2.5 to 10.1); vocalization: +7.4 dB (95% CI: 2.3 to 12.5); and sentences: +9.5 dB (95% CI: 4.7 to 14.3). However, 43.7% PwMS in the LSVT-LOUD and 10% in the conventional treatment group obtained a full recovery of voice intensity (>60 dB) post-treatment, Fisher's test = 13.3, p < 0.01. However, these improvements were not maintained at FU. Between-group differences at VHI were -10.8 (95% CI: -21.2 to -0.4) and -11.3 (95% CI: -24.3 to -1.7) in favor of LSVT-LOUD at post and FU. CONCLUSION: LSVT-LOUD can be a valid treatment to increase voice intensity in PwMS. However, results suggest the need for FU interventions targeting maintenance.

Swallowing Outcomes Following Voice Therapy in Multiple System Atrophy with Dysphagia: Comparison of Treatment Efficacy with Parkinson's Disease.

Difficulties with speech and swallowing occur in patients with Parkinsonism. Lee Silverman Voice Treatment (LSVT) is proven as an effective treatment for speech and swallowing function in idiopathic Parkinson's disease (IPD). The effect of LSVT on swallowing function in multiple system atrophy-cerebellar type (MSA-C) is unknown. We sought to determine LSVT's effect on swallowing function in MSA-C patients compared to IPD patients. LSVT-LOUD was performed on 13 patients with Parkinsonism (6 IPD and 7 MSA-C). Maximum phonation time (MPT), voice intensity, Speech Handicap Index-15 (SHI-15), Swallowing-Quality of Life (SWAL-QOL), National Institutes of Health-swallowing safety scale (NIH-SSS), and videofluoroscopic dysphagia scale (VDS) before and after LSVT were analyzed and reevaluated three months after treatment. The IPD and MSA-C groups showed significant improvements in overall speech and swallowing measures after LSVT. In particular, pharyngeal phase score and total score of VDS improved significantly in both groups. A two-way repeated-measure ANOVA revealed a significant main effect for time in the MPT, voice intensity, NIH-SSS, pharyngeal phase score and total score of VDS, psychosocial subdomain of SHI-15, and SWAL-QOL. The MSA-C group experienced less overall improvement in swallowing function, but the two groups had an analogous pattern of improvement. In conclusion, LSVT is effective for enhancing swallowing function, particularly in the pharyngeal phase, in both IPD and MSA-C patients. This study demonstrated that LSVT elicits significant improvements in MSA-C patients. We deemed LSVT to be an effective treatment for IPD and MSA-C patients who suffer from dysphagia.

The effect of breathing exercises combined with manual therapy on muscle tension dysphonia in traditional singers: a blinded randomized controlled trial.

BACKGROUND: Muscle tension dysphonia (MTD) is common in traditional singers and can lead to serious complications, but there is inconclusive evidence about how MTD should be treated in singers as professional voice users. This study was conducted to investigate the effects of breathing exercises combined with manual therapy versus breathing exercises and manual therapy on voice quality in traditional singers suffering from MTD. METHODS: In this blinded randomized clinical trial, 60 patients with MTD were randomly allocated to four groups: (1) breathing exercises, (2) manual therapy, (3) combined intervention (CI) and (4) control. Patients received treatments for 13 sessions, once per week. Treatment effects were assessed in terms of primary outcome measures: (1) breathing performance, measured by maximum phonation time (MPT) and (2) laryngeal function, measured by Stroboscopy Evaluation Rating Form (SERF). Secondary outcome measure was patient's self-perceived voice handicap, measured by Persian version of Singing Voice Handicap Index (SVHIp). All outcome variables were measured before and after treatment. The between group comparisons on MPT and SVHIp score were investigated using analysis of covariance (ANCOVA). The Kruskal-Wallis non-parametric test was used for between group comparisons of SERF items. RESULTS: Three treatment groups had improved regarding breathing performance, laryngeal function and voice handicap over the time (P < 0.01). The improvements achieved in all outcomes were significantly greater in the CI group than those of the breathing exercises, manual therapy and control groups. CONCLUSIONS: This randomized controlled trial showed that the combination of breathing exercises and manual therapy significantly improved the laryngeal function, breathing performance and voice handicap in traditional singers suffering from MTD. TRIAL REGISTRATION: IRCT2015102524686N1.

Effects of voice therapy in children with vocal fold nodules: A systematic review.

BACKGROUND: Vocal fold nodules (VFNs) are the main cause of paediatric dysphonia. Voice therapy is recommended as the preferable treatment option for VFNs in children. AIM: The aim of this systematic review is to provide an overview of the existing literature concerning the effects of voice therapy in children with VFNs. METHODS & PROCEDURES: This systematic literature review was developed following the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. The Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE (via PubMed) and Embase were searched and the grey literature was checked. The search strategy was based on three concepts: VFNs, voice therapy and children. Two examiners independently determined article eligibility and extracted all relevant data from the included studies. The methodological quality of the included study was assessed using the QualSyst tool. MAIN CONTRIBUTIONS: By identifying, evaluating and summarizing the results of all relevant studies about voice therapy in paediatric VFNs, this systematic review makes the available evidence more accessible to voice therapists, otolaryngologists and other relevant stakeholders. CONCLUSIONS & IMPLICATIONS: 24 studies were included in this systematic review. Eight studies (8/24) reported a significant improvement for at least one outcome parameter after voice therapy. However, five papers (5/24) could not demonstrate significant changes after voice therapy. All studies that did not test for significance (11/24) found improvements for one or more outcome parameters. The overall quality of the included studies is adequate (55%). In sum, there is some evidence that voice therapy is effective in children with VFNs, but further well-designed research, especially randomized controlled trials, is necessary to confirm these results. WHAT THIS PAPER ADDS: What is already known on the subject Voice therapy is preferable in children with VFNs because of the phonotraumatic nature of the nodules and the associated high recurrence rate after phonosurgery. Most voice therapists in clinical practice offer an eclectic voice therapy programme, consisting of direct and indirect voice therapy techniques. What this study adds to existing knowledge This systematic review provides a clear overview of the available evidence concerning the effects of voice therapy in paediatric VFNs. There is some evidence that voice therapy is an effective treatment option in children with VFNs, but well-designed research is scarce on this subject. What are the potential or actual clinical implications of this work? This review shows that effectiveness studies with strong designs are very scarce in children with VFNs. Clinicians should be aware that few therapy techniques have been thoroughly investigated in this population. However, this review may guide voice therapists when creating a treatment plan for a child with VFNs because it identifies, evaluates and summarizes the results of all relevant individual studies about voice therapy in paediatric VFNs. Voice therapy seems to be effective in treating paediatric patients with VFNs, given the fact that a considerable number of included studies report significant improvements after voice therapy. Both direct and indirect therapy approaches appear to have a positive effect on the phonation of children with VFNs.

Perceived Gender and Client Satisfaction in Transgender Voice Work: Comparing Self and Listener Rating Scales across a Training Program.

BACKGROUND/AIM: Scales used to collect perceptual ratings related to a speaker's gender are widely used in gender affirming voice training for trans individuals. Such scales may be used as outcome measures to gain insight into whether training has helped clients meet personal goals related to gender expression. These scales are also widely used in general research investigating the relationship between vocal characteristics and perceptions of speaker gender. However, past studies in these areas have varied in the terminology used to label rating scales and the impact of this variation is currently unknown. Additionally, research has not yet fully explored the relationship between self- and listener ratings of trans participant voices and trans participant satisfaction with voice, and whether or not these relationships change after trans participants undertake gender affirming voice training. This research paper aimed to explore these relationships and address these research gaps. METHODS: A group of 34 trans participants were asked to rate their voices before and after participating in gender affirming voice training. Trans participant voice samples from before and after training were also presented to a group of 25 listeners for rating. Perceptual ratings were made on two visual analogue scales (VAS) with anchors "very feminine/very masculine" and "very female/very male." Trans participants also rated their satisfaction with their current voice on a VAS with anchors "very satisfied/very unsatisfied." Correlation coefficients were calculated to investigate the relationship between collected ratings. RESULTS: Differences in scale labels were found to have minimal impact on ratings made by both trans participants and listeners. Trans participant self-ratings were found to correlate with listener ratings, but this correlation was not strong. Trans participant self-ratings had a consistently stronger relationship with their self-rated vocal satisfaction. The study contributed new findings that these differences may be more pronounced after trans participants have completed voice training. DISCUSSION/CONCLUSION: This study suggests that results from past studies that have used differently labelled scales to collect ratings related to gender perception based on voice are suitable to compare. This study also discusses the implications reported differences between trans participant self-ratings and listener ratings may have for research and clinical practice.

Clinician and Patient Perception of a Voice Therapy Program Utilizing a Variably Occluded Face Mask: A Pilot Study.

OBJECTIVE: The purpose of this investigation was to assess clinician and patient feedback about voice therapy using a variably occluded face mask (VOFM) and to determine if voice therapy augmented via a VOFM would result in favorable changes in patient self-perceived handicap, as well as acoustic and aerodynamic measures. METHODS/DESIGN: This pilot study used a prospective, pre-post single group design. Eleven patients with dysphonia due to primary muscle tension dysphonia (8) or benign vocal fold lesions (3) were recruited. Data collected included patient and clinician feedback of voice therapy using a VOFM, voice handicap index (VHI)-10, acoustic and aerodynamic measures. Data were collected before treatment (baseline) and 1-week post-therapy. Wilcoxon signed-rank tests were used to compare data pre- and post-therapy. RESULTS: Statistically significant improvement was observed for the VHI-10 with a median delta of -7. Clinician feedback generally reported that patients liked the VOFM, using the VOFM within the first two sessions of therapy, and within less than 10 min of use. All clinicians ranked the conversation level of the hierarchy as the most effective level. Three themes emerged from the Therapy Feedback Form: the VOFM was a (1) "Facilitator for Sensation," (2) a "Physical Tool," and that there was (3) "No Program Needed" to use the VOFM in voice therapy. There was a statistically significant improvement in cepstral peak prominence (p = 0.0329) and cepstral spectral index of dysphonia (p = 0.0164) in sustained vowels. DISCUSSION: This pilot study represents the first investigation into clinician and patient perceptions of using a VOFM. Reported measures via patient perception, as well as clinician perceptions, and some acoustic and aerodynamic measures showed that participants got better with VOFM voice therapy. Last, in general, both clinicians and patients liked utilizing a VOFM in voice therapy.