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Temporal suppression and augmentation of click-evoked otoacoustic emissions
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Verhulst, Sarah, Harte, James M. and Dau, Torsten (2008) Temporal suppression and augmentation of click-evoked otoacoustic emissions. In: 155th Meeting of the Acoustical Society of America , Paris, France, Jun 30 - Jul 4, 2008. Published in: Hearing Research, Vol.246 (No.1-2). pp. 23-35. doi:10.1016/j.heares.2008.09.008 ISSN 0378-5955.
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Official URL: http://dx.doi.org/10.1016/j.heares.2008.09.008
Abstract
This study investigates temporal suppression of click-evoked otoacoustic emissions (CEOAEs), occurring when a suppressor-click is presented close in time to a test-click (e.g. 0–8 ms). Various temporal suppression methods for examining temporal changes in cochlear compression were evaluated and measured here for seven subjects, both for short- and long-latency CEOAEs. Long-latency CEOAEs (duration >20 ms) typically indicate the presence of synchronised spontaneous otoacoustic emissions (SSOAEs). Temporal suppression can only be linked to changes in CEOAE-compression if the suppressor-click affects the CEOAE magnitude. Phase changes induced by the suppressor-click were shown to bias suppression in two ways: (i) when a specific asymmetric measurement method was used and (ii) when synchronisation between the CEOAE and the click-stimuli was incomplete. When such biases were eliminated, temporal suppression and augmentation (the opposite effect) were observed and shown to be subject-dependent. This indicates that the nonlinearity underlying temporal suppression can work in a more (i.e., suppressed) or less (i.e., augmented) compressive state, depending on the inter-click interval and the subject under test. Temporal suppression was shown to be comparable for CEOAEs and SSOAEs, indicating similar underlying cochlear nonlinear mechanisms. This study contributes to a better understanding of the temporal properties of cochlear dynamics.
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Subjects: | R Medicine > RF Otorhinolaryngology T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||
| Journal or Publication Title: | Hearing Research | ||||
| Publisher: | Elsevier BV | ||||
| ISSN: | 0378-5955 | ||||
| Official Date: | 2008 | ||||
| Dates: |
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| Volume: | Vol.246 | ||||
| Number: | No.1-2 | ||||
| Page Range: | pp. 23-35 | ||||
| DOI: | 10.1016/j.heares.2008.09.008 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Technical University of Denmark (DTU), SNAK Research School, Syddansk Universitet, Denmark, GN ReSound A/S | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | 155th Meeting of the Acoustical Society of America | ||||
| Type of Event: | Other | ||||
| Location of Event: | Paris, France | ||||
| Date(s) of Event: | Jun 30 - Jul 4, 2008 |
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