Effects of Aging on the Subcortical Encoding of Stop Consonants.
Am J Audiol
; 29(3): 391-403, 2020 Sep 03.
Article
en En
| MEDLINE
| ID: mdl-32693610
Purpose The main purpose of this study was to evaluate aging effects on the predominantly subcortical (brainstem) encoding of the second-formant frequency transition, an essential acoustic cue for perceiving place of articulation. Method Synthetic consonant-vowel syllables varying in second-formant onset frequency (i.e., /ba/, /da/, and /ga/ stimuli) were used to elicit speech-evoked auditory brainstem responses (speech-ABRs) in 16 young adults (M age = 21 years) and 11 older adults (M age = 59 years). Repeated-measures mixed-model analyses of variance were performed on the latencies and amplitudes of the speech-ABR peaks. Fixed factors were phoneme (repeated measures on three levels: /b/ vs. /d/ vs. /g/) and age (two levels: young vs. older). Results Speech-ABR differences were observed between the two groups (young vs. older adults). Specifically, older listeners showed generalized amplitude reductions for onset and major peaks. Significant Phoneme × Group interactions were not observed. Conclusions Results showed aging effects in speech-ABR amplitudes that may reflect diminished subcortical encoding of consonants in older listeners. These aging effects were not phoneme dependent as observed using the statistical methods of this study.
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1
Base de datos:
MEDLINE
Asunto principal:
Percepción del Habla
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Envejecimiento
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Potenciales Evocados Auditivos del Tronco Encefálico
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Am J Audiol
Asunto de la revista:
AUDIOLOGIA
Año:
2020
Tipo del documento:
Article