Abstract
The presentation of contralateral noise during the recording of transient evoked otoacoustic emissions (TEOAEs) reduces the amplitude of the TEOAE in normally-hearing adults. This is known as TEOAE suppression. The present study investigated TEOAE suppression in 18 adults with learning disabilities (LDs) compared to 18 adults without LDs. TEOAEs were elicited by 60 dB p.e. SPL clicks and were suppressed by the presentation of 60 dB SPL contralateral broadband noise. Suppression was measured as a change in the overall TEOAE response amplitude, and also analysed in 2-ms epochs representing different TEOAE frequency-response bands. A significant interaction was evident between group type and ear tested. Participants in the control group had right ear dominance for the suppression effect, whereas the left ear was found to be dominant for the LD group. These findings suggest a mechanism of the medial olivary cochlear bundle and efferent auditory pathway that differs in those with LD compared to those with typical learning abilities.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 607-614 |
| Number of pages | 8 |
| Journal | International Journal of Audiology |
| Volume | 47 |
| Issue number | 10 |
| DOIs | |
| State | Published - Oct 2008 |
Keywords
- Adult
- Contralateral suppression
- Learning disability
- Medial olivary cochlear bundle (MOCB)
- Transient evoked otoacoustic emission (TEOAE)
ASJC Scopus subject areas
- Language and Linguistics
- Linguistics and Language
- Speech and Hearing