Influence of suppression on restoration of spectral loudness summation in listeners with hearing loss
| Autor: | Walt Jesteadt, Michael P. Gorga, Robin High, Stephen T. Neely, Daniel M. Rasetshwane, Judy G. Kopun |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Adult
Male medicine.medical_specialty Acoustics and Ultrasonics Hearing loss Loudness Perception Audiology 01 natural sciences Loudness Young Adult 03 medical and health sciences Hearing Aids 0302 clinical medicine CLs upper limits Narrowband Arts and Humanities (miscellaneous) 0103 physical sciences medicine Humans Hearing Loss 030223 otorhinolaryngology 010301 acoustics Aged Mathematics Aged 80 and over Middle Aged Psychological and Physiological Acoustics medicine.disease Acoustic Stimulation Auditory Perception Female Sensorineural hearing loss medicine.symptom |
| Zdroj: | The Journal of the Acoustical Society of America. 143:2994-3008 |
| ISSN: | 0001-4966 |
| Popis: | Loudness depends on both the intensity and spectrum of a sound. Listeners with normal hearing perceive a broadband sound as being louder than an equal-level narrowband sound because loudness grows nonlinearly with level and is then summed across frequency bands. This difference in loudness as a function of bandwidth is reduced in listeners with sensorineural hearing loss (SNHL). Suppression, the reduction in the cochlear response to one sound by the simultaneous presentation of another sound, is also reduced in listeners with SNHL. Hearing-aid gain that is based on loudness measurements with pure tones may fail to restore normal loudness growth for broadband sounds. This study investigated whether hearing-aid amplification that mimics suppression can improve loudness summation for listeners with SNHL. Estimates of loudness summation were obtained using measurements of categorical loudness scaling (CLS). Stimuli were bandpass-filtered noises centered at 2 kHz with bandwidths in the range of 0.1–6.4 kHz. Gain was selected to restore normal loudness based on CLS measurements with pure tones. Gain that accounts for both compression and suppression resulted in better restoration of loudness summation, compared to compression alone. However, restoration was imperfect, suggesting that additional refinements to the signal processing and gain-prescription algorithms are needed.Loudness depends on both the intensity and spectrum of a sound. Listeners with normal hearing perceive a broadband sound as being louder than an equal-level narrowband sound because loudness grows nonlinearly with level and is then summed across frequency bands. This difference in loudness as a function of bandwidth is reduced in listeners with sensorineural hearing loss (SNHL). Suppression, the reduction in the cochlear response to one sound by the simultaneous presentation of another sound, is also reduced in listeners with SNHL. Hearing-aid gain that is based on loudness measurements with pure tones may fail to restore normal loudness growth for broadband sounds. This study investigated whether hearing-aid amplification that mimics suppression can improve loudness summation for listeners with SNHL. Estimates of loudness summation were obtained using measurements of categorical loudness scaling (CLS). Stimuli were bandpass-filtered noises centered at 2 kHz with bandwidths in the range of 0.1–6.4 kHz. Ga... |
| Databáze: | OpenAIRE |
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