Encoding of speech sounds at auditory brainstem level in good and poor hearing aid performers

Autor: Hemanth Narayan Shetty, Manjula Puttabasappa
Rok vydání: 2017
Předmět:
Adult
Male
Hearing aid
medicine.medical_specialty
Adolescent
Acceptable noise level
Hearing Loss
Sensorineural
medicine.medical_treatment
Speech sounds
Annoyance
Frequency following response
Audiology
01 natural sciences
Young Adult
03 medical and health sciences
Hearing Aids
0302 clinical medicine
0103 physical sciences
Evoked Potentials
Auditory
Brain Stem
otorhinolaryngologic diseases
medicine
Humans
Sound Localization
Ear canal
Noise level
030223 otorhinolaryngology
010301 acoustics
Aged
Auditory Threshold
Middle Aged
lcsh:Otorhinolaryngology
Hearing aid performer
Adaptation
Physiological
lcsh:RF1-547
Noise
medicine.anatomical_structure
Acoustic Stimulation
Otorhinolaryngology
Nível de ruído aceitável
Speech Perception
Female
Usuário de aparelho auditivo
Brainstem
Psychology
Frequência seguida de resposta
Zdroj: Brazilian Journal of Otorhinolaryngology, Vol 83, Iss 5, Pp 512-522
Brazilian Journal of Otorhinolaryngology v.83 n.5 2017
Brazilian Journal of Otorhinolaryngology
Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial (ABORL-CCF)
instacron:ABORL-CCF
ISSN: 1808-8694
DOI: 10.1016/j.bjorl.2016.06.004
Popis: Introduction Hearing aids are prescribed to alleviate loss of audibility. It has been reported that about 31% of hearing aid users reject their own hearing aid because of annoyance towards background noise. The reason for dissatisfaction can be located anywhere from the hearing aid microphone till the integrity of neurons along the auditory pathway. Objectives To measure spectra from the output of hearing aid at the ear canal level and frequency following response recorded at the auditory brainstem from individuals with hearing impairment. Methods A total of sixty participants having moderate sensorineural hearing impairment with age range from 15 to 65 years were involved. Each participant was classified as either Good or Poor Hearing aid Performers based on acceptable noise level measure. Stimuli /da/ and /si/ were presented through loudspeaker at 65 dB SPL. At the ear canal, the spectra were measured in the unaided and aided conditions. At auditory brainstem, frequency following response were recorded to the same stimuli from the participants. Results Spectrum measured in each condition at ear canal was same in good hearing aid performers and poor hearing aid performers. At brainstem level, better F 0 encoding; F 0 and F 1 energies were significantly higher in good hearing aid performers than in poor hearing aid performers. Though the hearing aid spectra were almost same between good hearing aid performers and poor hearing aid performers, subtle physiological variations exist at the auditory brainstem. Conclusion The result of the present study suggests that neural encoding of speech sound at the brainstem level might be mediated distinctly in good hearing aid performers from that of poor hearing aid performers. Thus, it can be inferred that subtle physiological changes are evident at the auditory brainstem in a person who is willing to accept noise from those who are not willing to accept noise.
Databáze: OpenAIRE
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