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Onset of auditory deprivation
1Department of Communication Disorders, Louisiana State University Health Science Center, New Orleans, Louisiana, USA.
Journal of the American Academy of Audiology
|December 29, 1999
Summary
Monaural hearing aid fittings can lead to auditory function deterioration in the unaided ear for individuals with sensorineural hearing loss (SNHL). This decline in word recognition scores was observed in 25% of monaural fitting subjects.
Area of Science:
- Audiology
- Neuroscience
- Otolaryngology
Background:
- Sensorineural hearing loss (SNHL) affects auditory function.
- Monaural hearing aid fittings are common for bilateral SNHL.
- The impact on the unaided ear is not fully understood.
Purpose of the Study:
- To investigate auditory function changes in the unaided ear of SNHL patients with monaural hearing aid fittings.
- To compare these changes with those in binaurally fitted patients.
Main Methods:
- Examined word recognition scores (WRSs) using Northwestern University Auditory Test No. 6 (NU-6).
- Assessed 77 monaurally and 65 binaurally fitted subjects with symmetric bilateral SNHL.
- Evaluated WRSs at 1, 3, and 5 years post-fitting.
Main Results:
- 25% of monaurally fitted subjects showed significant WRS decline in the unaided ear.
- Only 6% of binaurally fitted subjects experienced significant WRS changes in either ear.
- Auditory function decline was not linked to reduced hearing sensitivity.
Conclusions:
- Auditory function does deteriorate in the unaided ear following monaural hearing aid fittings for SNHL.
- Monaural fitting increases the risk of unaided ear function decline compared to binaural fitting.
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