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Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss

Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss

Published on: January 25, 2016

Hearing aid validation based on 40 Hz auditory steady-state response thresholds.

Sara Sardari¹, Zahra Jafari², Hamid Haghani³

¹Department of Audiology, Faculty of Rehabilitation, Tehran University of Medical Sciences, Iran.

Hearing Research

|September 20, 2015

Summary

Aided auditory steady-state responses (ASSRs) can help predict hearing aid success. Comparing gains, not thresholds, is more accurate for hearing aid validation and cochlear implant decisions.

Keywords:

Auditory steady-state response Functional gain Hearing aid Validation

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Area of Science:

Audiology
Hearing Science
Neuroscience

Background:

Aided thresholds are crucial for predicting hearing aid efficacy and guiding decisions between hearing aids and cochlear implants.
Auditory steady-state responses (ASSRs) offer a potential method for assessing auditory function with amplification.

Purpose of the Study:

To compare the characteristics of aided and unaided auditory steady-state responses (ASSRs).
To evaluate the utility of aided ASSRs in predicting hearing aid success and informing cochlear implant decisions.

Main Methods:

30 participants with moderate to profound hearing impairment underwent acoustic immittance, behavioral audiometry, and 40 Hz ASSR testing, both unaided and aided.
Biological calibration involved 16 normal-hearing and 17 severe-hearing-loss individuals.

Main Results:

Significant differences were found between unaided behavioral and ASSR thresholds across frequencies.
Aided behavioral and ASSR thresholds differed significantly at 1000 and 2000 Hz.
Aided ASSRs were recordable in some severe to profoundly hearing-impaired individuals, correlating with speech clarity and speech-reading ability.

Conclusions:

Comparing functional and ASSR gains is more accurate for hearing aid validation than comparing thresholds.
The inability to record aided ASSRs suggests a poor prognosis for hearing aid success.
Aided ASSR testing, with careful fitting and testing conditions, can be a valuable tool for hearing aid validation and cochlear implant decision-making.