Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 8.536
Filtrar
1.
Sensors (Basel) ; 21(3)2021 Jan 31.
Artigo em Inglês | MEDLINE | ID: mdl-33572684

RESUMO

This report describes the design of a new piezoelectric transducer for round window (RW)-driven middle ear implants. The transducer consists of a piezoelectric element, gold-coated copper bellows, silicone elastomer (polydimethylsiloxane, PDMS), metal cylinder (tungsten), and titanium housing. The piezoelectric element is fixed to the titanium housing and mechanical resonance is generated by the interaction of the bellows, PDMS, and tungsten cylinder. The dimensions of PDMS and the tungsten cylinder with output characteristics suitable for compensation of sensorineural hearing loss were derived by mechanical vibrational analysis (equivalent mechanical model and finite element analysis (FEA)). Based on the results of FEA, the RW piezoelectric transducer was implemented, and bench tests were performed under no-load conditions to confirm the output characteristics. The transducer generates an average displacement of 219.6 nm in the flat band (0.1-1 kHz); the resonance frequency is 2.3 kHz. To evaluate the output characteristics, the response was compared to that of an earlier transducer. When driven by the same voltage (6 Vp), the flat band displacement averaged 30 nm larger than that of the other transducer, and no anti-resonance was noted. Therefore, we expect that the new transducer can serve as an output device for hearing aids, and that it will improve speech recognition and treat high-frequency sensorineural hearing loss more effectively.


Assuntos
Auxiliares de Audição , Perda Auditiva Neurossensorial , Prótese Ossicular , Humanos , Janela da Cóclea , Transdutores
2.
Sci Data ; 7(1): 440, 2020 12 17.
Artigo em Inglês | MEDLINE | ID: mdl-33335098

RESUMO

The Cocktail Party Effect refers to the ability of the human sense of hearing to extract a specific target sound source from a mixture of background noises in complex acoustic scenarios. The ease with which normal hearing people perform this challenging task is in stark contrast to the difficulties that hearing-impaired subjects face in these situations. To help patients with hearing aids and implants, scientists are trying to imitate this ability of human hearing, with modest success so far. To support the scientific community in its efforts, we provide the Bern Cocktail Party (BCP) dataset consisting of 55938 Cocktail Party scenarios recorded from 20 people and a head and torso simulator wearing cochlear implant audio processors. The data were collected in an acoustic chamber with 16 synchronized microphones placed at purposeful positions on the participants' heads. In addition to the multi-channel audio source and image recordings, the spatial coordinates of the microphone positions were digitized for each participant. Python scripts were provided to facilitate data processing.


Assuntos
Implantes Cocleares , Auxiliares de Audição , Audição , Ruído , Acústica , Humanos
3.
Braz. j. otorhinolaryngol. (Impr.) ; 86(6): 734-742, Nov.-Dec. 2020. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1142590

RESUMO

Abstract Introduction: Tinnitus is defined as the perception of sound without its actual presence in the environment. It has been the subject of a great number of studies, especially considering its consequences on patient's quality of life. Objective: This study aimed to investigate the effect of hearing aids and/or Ginkgo biloba extract EGb 761 on tinnitus in patients with hearing loss. Methods: This is a trial randomized-controlled treatment, parallel, double-blind, with three-arm. Thirty-three adults subjects were divided into three groups: group 1 — subjects undergoing drug therapy with Ginkgo biloba extract EGb 761; group 2 — individuals fitted with digital hearing aids; group 3 — individuals submitted to drug therapy with Ginkgo biloba extract EGb 761 and using hearing aids. The tinnitus handicap inventory and visual analogue scale were used to evaluate self-perception of tinnitus loudness and severity before treatment and 90 days after treatment. Results: This study demonstrated a significant correlation between tinnitus handicap inventory and visual analogue scale, before and after treatment. We observed a significant improvement in self-perception of tinnitus loudness and severity after 90 days of treatment with Ginkgo biloba extract EGb 761 and/or hearing aids. No correlation was found between tinnitus onset time and self-perception of tinnitus loudness and severity. Hearing aids were more effective in patients with a shorter tinnitus onset time and Ginkgo biloba extract was effective regardless of tinnitus duration. Conclusions: It was possible to prove the effectiveness of the hearing aids and/or Ginkgo biloba extract EGb 761 treatment, which shows success in the control of tinnitus contributing to the improvement of this symptom.


Resumo Introdução: O zumbido é definido como a percepção de um som sem a sua presença real no ambiente e tem sido objeto de um grande número de estudos, especialmente devido às suas consequências na qualidade de vida do paciente. Objetivo: Investigar o efeito de próteses auditivas e/ou extrato de Ginkgo biloba EGb 761 sobre o zumbido em pacientes com perda auditiva. Método: Ensaio clínico randomizado controlado, paralelo, duplo-cego, com três braços. Trinta e três indivíduos adultos foram divididos em três grupos: Grupo 1 - indivíduos submetidos à terapia medicamentosa com extrato de Ginkgo biloba EGb 761; Grupo 2 - indivíduos equipados com próteses auditivas digitais; Grupo 3 - indivíduos submetidos à terapia medicamentosa com extrato de Ginkgo biloba EGb 761 e próteses auditivas. O Tinnitus handicap inventory e a escala visual analógica foram usados para avaliar a autopercepção de intensidade e da gravidade do zumbido antes do tratamento e 90 dias após o tratamento. Resultados: Este estudo demonstrou uma correlação significante entre o Tinnitus handicap inventory e a escala visual analógica, antes e após o tratamento. Observou-se melhoria significativa na autopercepção de loudness e da intensidade do zumbido após 90 dias de tratamento com extrato de Ginkgo biloba EGb 761 e/ou prótese auditiva. Não foi encontrada correlação entre o tempo de início do zumbido e a autopercepção da intensidade e gravidade do zumbido. As próteses auditivas foram mais eficazes em pacientes com menor tempo de início de zumbido e o extrato de Ginkgo biloba foi eficaz, independentemente da duração do zumbido. Conclusões: Foi possível comprovar a eficácia do tratamento com a prótese auditiva e/ou extrato de Ginkgo biloba EGb 761, o que demonstra sucesso no controle do zumbido e contribui para a melhoria desse sintoma.


Assuntos
Humanos , Zumbido/tratamento farmacológico , Auxiliares de Audição , Qualidade de Vida , Extratos Vegetais , Método Duplo-Cego , Ginkgo biloba
4.
Ear Hear ; 42(1): 20-28, 2020 12 22.
Artigo em Inglês | MEDLINE | ID: mdl-33369590

RESUMO

OBJECTIVES: The impact of social distancing on communication and psychosocial variables among individuals with hearing impairment during COVID-19 pandemic. It was our concern that patients who already found themselves socially isolated (Wie et al. 2010) as a result of their hearing loss would be perhaps more susceptible to changes in their communication habits resulting in further social isolation, anxiety, and depression. We wanted to better understand how forced social isolation (as part of COVID-19 mitigation) effected a group of individuals with hearing impairment from an auditory ecology and psychosocial perspective. We hypothesized that the listening environments would be different as a result of social isolation when comparing subject's responses regarding activities and participation before COVID-19 and during the COVID-19 pandemic. This change would lead to an increase in experienced and perceived social isolation, anxiety, and depression. DESIGN: A total of 48 adults with at least 12 months of cochlear implant (CI) experience reported their listening contexts and experiences pre-COVID and during-COVID using Ecological Momentary Assessment (EMA; methodology collecting a respondent's self-reports in their natural environments) through a smartphone-based app, and six paper and pencil questionnaires. The Smartphone app and paper-pencil questionnaires address topics related to their listening environment, social isolation, depression, anxiety, lifestyle and demand, loneliness, and satisfaction with amplification. Data from these two-time points were compared to better understand the effects of social distancing on the CI recipients' communication abilities. RESULTS: EMA demonstrated that during-COVID CI recipients were more likely to stay home or be outdoors. CI recipients reported that they were less likely to stay indoors outside of their home relative to the pre-COVID condition. Social distancing also had a significant effect on the overall signal-to-noise ratio of the environments indicating that the listening environments had better signal-to-noise ratios. CI recipients also reported better speech understanding, less listening effort, less activity limitation due to hearing loss, less social isolation due to hearing loss, and less anxiety due to hearing loss. Retrospective questionnaires indicated that social distancing had a significant effect on the social network size, participant's personal image of themselves, and overall loneliness. CONCLUSIONS: Overall, EMA provided us with a glimpse of the effect that forced social isolation has had on the listening environments and psychosocial perspectives of a select number of CI listeners. CI participants in this study reported that they were spending more time at home in a quieter environments during-COVID. Contrary to our hypothesis, CI recipients overall felt less socially isolated and reported less anxiety resulting from their hearing difficulties during-COVID in comparison to pre-COVID. This, perhaps, implies that having a more controlled environment with fewer speakers provided a more relaxing listening experience.


Assuntos
/prevenção & controle , Implante Coclear , Perda Auditiva/psicologia , Razão Sinal-Ruído , Percepção da Fala , Adulto , Idoso , Ansiedade/psicologia , Implantes Cocleares , Surdez/fisiopatologia , Surdez/psicologia , Surdez/reabilitação , Depressão/psicologia , Avaliação Momentânea Ecológica , Meio Ambiente , Feminino , Auxiliares de Audição , Perda Auditiva/fisiopatologia , Perda Auditiva/reabilitação , Perda Auditiva Bilateral/fisiopatologia , Perda Auditiva Bilateral/psicologia , Perda Auditiva Bilateral/reabilitação , Perda Auditiva Unilateral/fisiopatologia , Perda Auditiva Unilateral/psicologia , Perda Auditiva Unilateral/reabilitação , Humanos , Masculino , Pessoa de Meia-Idade , Ruído , Isolamento Social/psicologia
5.
J Laryngol Otol ; 134(12): 1065-1068, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33336637

RESUMO

OBJECTIVE: This study aimed to evaluate surgical and functional outcomes, in a tertiary referral centre, of two different types of semi-implantable transcutaneous bone conduction devices. METHOD: This study involved prospective data collection and review of patients implanted between November 2014 and December 2016. Glasgow Hearing Aid Inventory (Glasgow Hearing Aid Benefit Profile or Glasgow Hearing Aid Difference Profile) and Client Oriented Scale of Improvement were completed where appropriate. Surgical and audiological outcomes were recorded in the surgical notes. RESULTS: Glasgow Hearing Aid Difference Profile and Glasgow Hearing Aid Benefit Profile showed similar mean score in the active and the passive transcutaneous bone conduction devices. Client Oriented Scale of Improvement showed improvements in listening situations. Post-operative speech reception threshold showed better mean threshold in the active transcutaneous bone conduction devices group when compared with the passive transcutaneous bone conduction devices group. No device failures or surgical complications existed in either group, with the surgical time being less in the passive transcutaneous bone conduction devices group. CONCLUSION: Both devices are reliable semi-implantable transcutaneous bone conduction devices with excellent surgical and functional outcomes and patient satisfaction. Overall surgical time was much less in the passive transcutaneous bone conduction devices group with no necessity for pre-planning. This is much easier to remove with the possibility of conversion to other devices in the manufacturer's portfolio and wide-ranging wireless accessories. Further studies are needed to assess the longer-term results in a bigger population.


Assuntos
Condução Óssea/fisiologia , Auxiliares de Audição/estatística & dados numéricos , Perda Auditiva Condutiva/cirurgia , Próteses e Implantes/estatística & dados numéricos , Testes Auditivos/métodos , Humanos , Pessoa de Meia-Idade , Duração da Cirurgia , Satisfação do Paciente , Período Pós-Operatório , Estudos Prospectivos , Próteses e Implantes/tendências , Estudos Retrospectivos , Teste do Limiar de Recepção da Fala/métodos , Resultado do Tratamento
6.
Vestn Otorinolaringol ; 85(5): 18-23, 2020.
Artigo em Russo | MEDLINE | ID: mdl-33140928

RESUMO

Studies of the recent years are devoted to using the auditory steady-state responses (ASSR) as an evaluation method of amplification outcomes. In this case stimulation is performed in the sound field via loudspeaker with a hearing aid (HA) in patient's ear. GOAL: Estimation the optimal stimulation parameters of ASSR in free field, which provide maximum correlation with behavioral thresholds. MATERIALS AND METHODS: 26 subjects were included in the study: 10 with normal hearing (4 adults and 6 children) and 16 children (1-16 years old) with sensorineural hearing loss (SNHL). Aided and unaided ASSR thresholds were compared with corresponding behavioral thresholds (BT). All recordings were conducted in free sound field. We used mono-frequency stimulation method at 500-4000 Hz career frequencies. Modulation frequency was set as 40 Hz. Types of stimuli modulation: AM/FM modulation, exponential modulation (AM2), three carrier frequencies and modulated Chirp-tone (Chirp). RESULTS: In normal hearing subjects the difference between ASSR and BT varied from 0 dB to 35 dB, and the significant correlation between them was observed (p<0.05). The maximum difference between ASSR and BT in children with SNHL was at 500 Hz (15.6±4.3 dB), minimum - at 2 and 4 kHz (8±2.9 dB and 7±3 dB respectively). In aided condition maximum difference was detected at 500 Hz (10.2±3.8 dB), minimum - at 1 and 2 kHz (7.8±2.8 and 7.3±3.1 dB respectively). We got significantly less difference between ASSR and BT in all test conditions using following types of stimuli: at 500 Hz and 1000 Hz - AM2 (p<0.01); at 2 and 4 kHz - Chirp (p<0.05 and p<0.01 respectively). Thereby, free field ASSR might be used as an objective method of evaluation the amplification outcomes in children with SNHL.


Assuntos
Auxiliares de Audição , Perda Auditiva Neurossensorial , Estimulação Acústica , Adolescente , Adulto , Limiar Auditivo , Criança , Pré-Escolar , Perda Auditiva Neurossensorial/diagnóstico , Testes Auditivos , Humanos , Lactente
7.
Trends Hear ; 24: 2331216520960861, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33073727

RESUMO

Effective hearing aid (HA) rehabilitation requires personalization of the HA fitting parameters, but in current clinical practice only the gain prescription is typically individualized. To optimize the fitting process, advanced HA settings such as noise reduction and microphone directionality can also be tailored to individual hearing deficits. In two earlier studies, an auditory test battery and a data-driven approach that allow classifying hearing-impaired listeners into four auditory profiles were developed. Because these profiles were found to be characterized by markedly different hearing abilities, it was hypothesized that more tailored HA fittings would lead to better outcomes for such listeners. Here, we explored potential interactions between the four auditory profiles and HA outcome as assessed with three different measures (speech recognition, overall quality, and noise annoyance) and six HA processing strategies with various noise reduction, directionality, and compression settings. Using virtual acoustics, a realistic speech-in-noise environment was simulated. The stimuli were generated using a HA simulator and presented to 49 habitual HA users who had previously been profiled. The four auditory profiles differed clearly in terms of their mean aided speech reception thresholds, thereby implying different needs in terms of signal-to-noise ratio improvement. However, no clear interactions with the tested HA processing strategies were found. Overall, these findings suggest that the auditory profiles can capture some of the individual differences in HA processing needs and that further research is required to identify suitable HA solutions for them.


Assuntos
Auxiliares de Audição , Perda Auditiva Neurossensorial , Percepção da Fala , Limiar Auditivo , Audição , Perda Auditiva Neurossensorial/diagnóstico , Humanos , Ruído/efeitos adversos , Fala
8.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 3881-3884, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33018848

RESUMO

Bone-conducted ultrasound (BCU) is perceived even by the profoundly sensorineural deaf and has been applied to the development of a novel hearing aid. In the BCU hearing aid, the vibrator is pressed onto the mastoid process of the temporal bone (the osseous bulge behind the ear). However, BCU can be heard on distal parts of the body; e.g., the muscle of the neck, the clavicle and the upper limbs. Some studies have been carried out to develop other BCU hearing devices using this "distant presentation". However, the possibility of the localization of distantly-presented BCU has not been verified. In this study, we investigated whether listeners could use the interaural time differences (ITDs) and intensity differences (IIDs) as cues for lateralization (left/right discrimination) of distantly-presented BCU. The results showed that lateralization based on ITDs and IIDs is possible to some extent, even for the distant presentation, whereas lateralization become difficult as the stimulus placement gets further from the head. Lateralization based on IIDs was more accurate than that based on ITDs. IIDs seem to give more effective cues than ITDs in the lateralization of BCU.


Assuntos
Condução Óssea , Auxiliares de Audição , Estimulação Acústica , Audição , Testes Auditivos
9.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 4221-4224, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33018928

RESUMO

Internet of things (IoT) in healthcare, has effi-ciently accelerated medical monitoring and assessment through the real-time analysis of collected data. Hence, to support the hearing-impaired community with better calibrations to their clinical processors and hearing aids, a portable smart space interface - AURIS has been developed by the Cochlear Implant Processing Lab (CILab) at UT-Dallas. The proposed Auris interface periodically samples the acoustic space, and through a learn vs test phase, builds a Gaussian mixture model for each specific environmental locations. An effective connection is established by the Auris interface with the CRSS CCi-Mobile research platform through an android app to fine tune the con-figuration settings for cochlear implant (CI) or hearing aid (HA) users entering the room/location. Baseline objective evaluations have been performed in diverse naturalistic locations using 12 hours of audio data. The performance metrics is determined by a verified wireless communication, along with estimated acoustic environment knowledge and room classification at greater than 90% accuracy.


Assuntos
Implantes Cocleares , Auxiliares de Audição , Percepção da Fala , Acústica , Pesquisa Espacial
10.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 952-955, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33018142

RESUMO

In this paper, a dual-channel speech enhancement (SE) method is proposed. The proposed method is a combination of minimum variance distortionless response (MVDR) beamformer and a super-Gaussian joint maximum a posteriori (SGJMAP) based SE gain function. The proposed SE method runs on a smartphone in real-time, providing a portable device for hearing aid (HA) applications. Spectral Flux based voice activity detector (VAD) is used to improve the accuracy of the beamformer output. The efficiency of the proposed SE method is evaluated using speech quality and intelligibility measures and compared with that of other SE techniques. The objective and subjective test results show the capability of the proposed SE method in three different noisy conditions at low signal to noise ratios (SNRs) of -5, 0, and +5 dB.


Assuntos
Auxiliares de Audição , Smartphone , Voz , Humanos , Ruído , Inteligibilidade da Fala
11.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 956-959, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33018143

RESUMO

Deep neural networks (DNNs) have been useful in solving benchmark problems in various domains including audio. DNNs have been used to improve several speech processing algorithms that improve speech perception for hearing impaired listeners. To make use of DNNs to their full potential and to configure models easily, automated machine learning (AutoML) systems are developed, focusing on model optimization. As an application of AutoML to audio and hearing aids, this work presents an AutoML based voice activity detector (VAD) that is implemented on a smartphone as a real-time application. The developed VAD can be used to elevate the performance of speech processing applications like speech enhancement that are widely used in hearing aid devices. The classification model generated by AutoML is computationally fast and has minimal processing delay, which enables an efficient, real-time operation on a smartphone. The steps involved in real-time implementation are discussed in detail. The key contribution of this work include the utilization of AutoML platform for hearing aid applications and the realization of AutoML model on smartphone. The experimental analysis and results demonstrate the significance and importance of using the AutoML for the current approach. The evaluations also show improvements over the state of art techniques and reflect the practical usability of the developed smartphone app in different noisy environments.


Assuntos
Auxiliares de Audição , Smartphone , Aprendizado de Máquina , Ruído , Inteligibilidade da Fala
12.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 968-971, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33018146

RESUMO

A compressor in hearing aid devices (HADs) is responsible for mapping the dynamic range of input signals to the residual dynamic range of hearing-impaired (HI) patients. Gains and parameters of the compressor are set according to the HI patient's preferences. In different surroundings depending upon noise level, the patient may seek to tune the parameters to improve performance. Traditionally, fitting of the hearing aids is done by an audiologist using hearing aid software and the HI patient's opinion at a clinic. In this paper, we propose a frequency-based multi-band compressor implemented as a smartphone application, which can be used as an alternative to that of the traditional HADs. The proposed solution allows the user to tune the compression parameters for each band along with a choice of compression speed and fitting strategy. Exploiting smartphone processing and hardware capabilities, the application can be used for bilateral hearing loss. The performance of this easy-to-use smartphone-based application is compared with traditional HADs using a hearing aid test system. Objective and subjective evaluations are also carried out to quantify the performance.


Assuntos
Compressão de Dados , Auxiliares de Audição , Perda Auditiva , Percepção da Fala , Perda Auditiva/terapia , Perda Auditiva Bilateral , Humanos
13.
Annu Int Conf IEEE Eng Med Biol Soc ; 2020: 972-975, 2020 07.
Artigo em Inglês | MEDLINE | ID: mdl-33018147

RESUMO

Acoustic feedback cancellation is a challenging problem in the design of sound reinforcement systems, hearing aids, etc. Acoustic feedback is inevitable when the acoustic signal path forms a loop between the microphone and loudspeaker. An efficient short duration noise injection algorithm is proposed in this paper to estimate the impulse response of the acoustic feedback path model. The algorithm does not require any prior information about the acoustic feedback path. It is capable of optimally estimate the acoustic feedback path for cancellation, and avoid the occurrence of any howling episode, in varying acoustic environments. Presented algorithm is efficiently implemented on smartphone device having close proximity of loudspeaker and microphone to emulate the feedback condition. The algorithm being platform-independent can also be implemented for any set-up or system. The experimental results of the proposed method shows satisfying results and its ability to track and cancel the acoustic feedback in changing characteristics of the acoustic path.


Assuntos
Auxiliares de Audição , Ruído , Acústica , Algoritmos , Retroalimentação
14.
Braz. j. otorhinolaryngol. (Impr.) ; 86(5): 558-567, Sept.-Oct. 2020. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1132638

RESUMO

Abstract Introduction: Hearing aid users reject their own hearing aid because of annoyance with background noise. The reason for dissatisfaction is located anywhere from the hearing aid microphone to the integrity of neurons along the auditory pathway. In this preview, the output of hearing aid was recorded at the level of ear canal and at auditory cortex in good and poor hearing aid users, who were classified using acceptable noise level. Objective: To study the representation of amplified speech in good and poor hearing aid performers. Methods: A total of 60 participants (age ranged 15-65 years) with moderate bilateral sensorineural hearing impairment grouped into good (n = 35) and poor (n = 25) hearing aid performers. Gap detection test and aided SNR 50 were administered. In addition, ear canal acoustic measures and cortical auditory evoked potentials were recorded in unaided and aided conditions at 65 dB SPL. Results: Hearing aid minimally alters temporal contrast of speech reflected in envelope difference index. Although having similar temporal impairment, acoustic characteristics of amplified speech sounds and SNR 50 scores from both groups, the aided cortical auditory evoked potentials surprisingly showed significant earlier latencies and higher amplitudes in good performers than poor performers. In addition, good and poor performers classified based on annoyance level was predicted by latencies of 2N1 and 2P2 components of acoustic change complex. Further, a follow-up revealed hearing aid use has relation with acceptance towards noise. Conclusion: Participants who are willing to accept noise from those who are not willing to accept noise have subtle physiological changes evident at the auditory cortex, which supports the hearing aid usage.


Resumo Introdução: Usuários de aparelhos auditivos rejeitam seu próprio aparelho pelo incômodo relacionado ao ruído de fundo. O motivo da insatisfação varia desde o microfone do aparelho auditivo até a integridade dos neurônios ao longo da via auditiva. Nesta análise prévia, a saída da prótese auditiva foi registrada no nível do meato auditivo externo e no córtex auditivo em bons e maus usuários de prótese auditiva, que foram classificados com um nível de ruído aceitável. Objetivo: Estudar a representação da fala amplificada em bons e maus usuários de aparelhos auditivos. Método: Foram examinados 60 participantes (de 15 a 65 anos) com deficiência auditiva neurossensorial bilateral moderada divididos em bons (n = 35) e maus (n = 25) usuários de aparelhos auditivos. Teste de detecção de gap e SNR 50 assistido foi administrado. Além disso, as medidas acústicas do meato externo e os potenciais evocados auditivos corticais foram registrados em condições não assistida e assistida a 65 dB NPS. Resultados: O aparelho auditivo altera minimamente o contraste temporal da fala, refletido no envelope difference index. Embora tenham uma deficiência temporal similar, as características acústicas de sons de fala amplificados e escores do SNR 50 de ambos os grupos, os potenciais evocados auditivos corticais assistidos surpreendentemente demonstraram latências iniciais significativas e maiores amplitudes em bons do que em maus usuários. Além disso, os bons em comparação com os maus usuários, classificados com base no nível de incômodo, foram previstos pelas latências dos componentes 2N1 e 2P2 do complexo de alteração acústica. Além disso, os resultados do seguimento revelaram que o uso de aparelhos auditivos têm relação com a aceitação do ruído. Conclusão: Os participantes dispostos a aceitar o ruído, quando comparados com aqueles que não estão dispostos a aceitá-lo, apresentam evidência de sutis alterações fisiológicas no córtex auditivo, que apoiam o uso da prótese auditiva.


Assuntos
Humanos , Adolescente , Adulto , Pessoa de Meia-Idade , Idoso , Adulto Jovem , Percepção da Fala , Auxiliares de Audição , Fala , Perda Auditiva Neurossensorial , Ruído
15.
Trends Hear ; 24: 2331216520948974, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32865486

RESUMO

Automatic gain control (AGC) compresses the wide dynamic range of sounds to the narrow dynamic range of hearing-impaired listeners. Setting AGC parameters (time constants and knee points) is an important part of the fitting of hearing devices. These parameters do not only influence overall loudness elicited by the hearing devices but can also affect the recognition of speech in noise. We investigated whether matching knee points and time constants of the AGC between the cochlear implant and the hearing aid of bimodal listeners would improve speech recognition in noise. We recruited 18 bimodal listeners and provided them all with the same cochlear-implant processor and hearing aid. We compared the matched AGCs with the default device settings with mismatched AGCs. As a baseline, we also included a condition with the mismatched AGCs of the participants' own devices. We tested speech recognition in quiet and in noise presented from different directions. The time constants affected outcomes in the monaural testing condition with the cochlear implant alone. There were no specific binaural performance differences between the two AGC settings. Therefore, the performance was mostly dependent on the monaural cochlear implant alone condition.


Assuntos
Implante Coclear , Implantes Cocleares , Auxiliares de Audição , Percepção da Fala , Humanos , Fala
16.
Tex Med ; 116(8): 4-5, 2020 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-32866278

RESUMO

Like many areas of health care, hearing loss is best managed when hearing professionals collaborate closely with physicians. Primary care physicians (PCPs) are uniquely suited to manage hearing loss because 1) patients trust their PCP; 2) PCPs have insight into the overall health and well-being of their patients; and 3) the PCP workforce is large enough to make a meaningful impact. Accountable care organizations, clinically integrated networks, and patient-centered medical homes are perfectly suited to be a positive force in the hearing health of their patients.


Assuntos
Perda Auditiva/economia , Perda Auditiva/epidemiologia , Atenção Primária à Saúde , Organizações de Assistência Responsáveis , Demência/etiologia , Feminino , Auxiliares de Audição/economia , Perda Auditiva/diagnóstico , Perda Auditiva/reabilitação , Humanos , Masculino , Fatores de Risco , Texas
17.
PLoS One ; 15(9): e0238922, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32966301

RESUMO

Hearing aids are the primary tool in non-medical rehabilitation for individuals with hearing loss. While the costs of the electronic components have reduced substantially, the cost of a hearing aid has risen steadily to the point that it has become unaffordable for the majority of the population with Age-Related Hearing Loss (ARHL) especially for those residing in low- and middle-income countries. Here, we present an ultra-low-cost, affordable and accessible hearing aid device ('LoCHAid'), specifically targeted towards treating ARHL in elderly patients. The LoCHAid components cost 98 cents (< $1) when purchased in bulk for 10,000 units and can be personalized for each user through a 3D-printable case. It is designed to be an over-the-counter (OTC) self-serviceable solution for elderly individuals with ARHL. Electroacoustic measurements show that the device meets most of the targets set out by the WHO Preferred Product Profile and Consumer Technology Association for hearing aids. The frequency response of the hearing aid shows selectable gain in the range of 4-8 kHz, and mild to moderate gain between 200-1000 Hz, and shows very limited total distortion (1%). Simulated gain measurements show that the LoCHAid is well fitted to a range of ARHL profiles for males and females between the ages of 60-79 years. Overall, the measurements show that the device offers the potential to benefit individuals with ARHL. Thus, our proposed design has the potential to address the challenge of affordable and accessible hearing technology for hearing impaired elderly individuals especially in low- and middle-income countries.


Assuntos
Auxiliares de Audição/economia , Presbiacusia/reabilitação , Idoso , Desenho de Equipamento , Feminino , Testes Auditivos , Humanos , Masculino , Pessoa de Meia-Idade , Fatores Socioeconômicos
18.
Trends Hear ; 24: 2331216520938929, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32924797

RESUMO

The benefit in speech-recognition performance due to the compensation of a hearing loss can vary between listeners, even if unaided performance and hearing thresholds are similar. To accurately predict the individual performance benefit due to a specific hearing device, a prediction model is proposed which takes into account hearing thresholds and a frequency-dependent suprathreshold component of impaired hearing. To test the model, the German matrix sentence test was performed in unaided and individually aided conditions in quiet and in noise by 18 listeners with different degrees of hearing loss. The outcomes were predicted by an individualized automatic speech-recognition system where the individualization parameter for the suprathreshold component of hearing loss was inferred from tone-in-noise detection thresholds. The suprathreshold component was implemented as a frequency-dependent multiplicative noise (mimicking level uncertainty) in the feature-extraction stage of the automatic speech-recognition system. Its inclusion improved the root-mean-square prediction error of individual speech-recognition thresholds (SRTs) from 6.3 dB to 4.2 dB and of individual benefits in SRT due to common compensation strategies from 5.1 dB to 3.4 dB. The outcome predictions are highly correlated with both the corresponding observed SRTs (R2 = .94) and the benefits in SRT (R2 = .89) and hence might help to better understand-and eventually mitigate-the perceptual consequences of as yet unexplained hearing problems, also discussed in the context of hidden hearing loss.


Assuntos
Auxiliares de Audição , Percepção da Fala , Limiar Auditivo , Audição , Humanos , Fala
19.
Vestn Otorinolaringol ; 85(4): 30-34, 2020.
Artigo em Russo | MEDLINE | ID: mdl-32885633

RESUMO

The presence of additional disabilities (AD) in children with sensorineural hearing loss (SNHL) and influence of AD on age of hearing loss diagnosis and amplification were investigated. It was shown that 41% children with SNHL have different AD - pathology of the central neural system (including mental retardation, autism spectrum disorders, attention deficits), vision, motor and articulation impairments, cardiovascular, respiratory, urinary, digestive, endocrine diseases etc. 59% children among them have 2-3 AD. The most often combination of AD was pathology of central neural and motor systems. The genetic factor was revealed rarely in the group of children with AD than in children with SNHL only. The diagnosis of hearing loss before age 4 months was rarely in the group of children with AD. Possibly it is because of the most of such children got treatment in neonatal intensive care unit and didn't have access to universal newborn hearing screening. Moreover, SNHL might develop later as the outcome of their AD or their treatment. Suggestion about more late amplification in children with SNHL was confirmed. The cause might be wary relation of audiologists to amplification of children with AD and difficulties of this process.


Assuntos
Auxiliares de Audição , Perda Auditiva Neurossensorial , Perda Auditiva , Criança , Audição , Testes Auditivos , Humanos , Recém-Nascido
20.
Trends Hear ; 24: 2331216520948390, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32914708

RESUMO

Sound externalization, or the perception that a sound source is outside of the head, is an intriguing phenomenon that has long interested psychoacousticians. While previous reviews are available, the past few decades have produced a substantial amount of new data.In this review, we aim to synthesize those data and to summarize advances in our understanding of the phenomenon. We also discuss issues related to the definition and measurement of sound externalization and describe quantitative approaches that have been taken to predict the outcomes of externalization experiments. Last, sound externalization is of practical importance for many kinds of hearing technologies. Here, we touch on two examples, discussing the role of sound externalization in augmented/virtual reality systems and bringing attention to the somewhat overlooked issue of sound externalization in wearers of hearing aids.


Assuntos
Auxiliares de Audição , Localização de Som , Acústica , Audição , Humanos , Som
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...