Verhulst, Sarah, Harte, James M. and Dau, Torsten. (2011) Temporal suppression of the click-evoked otoacoustic emission level-curve. The Journal of the Acoustical Society of America, Vol.129 (No.3). pp. 1452-1463. ISSN 0001-4966

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Abstract

The click-evoked otoacoustic emission (CEOAE) level-curve grows linearly for clicks below 40–60 dB and saturates for higher inputs. This study investigates dynamic (i.e., time-dependent) features of the CEOAE level-curve by presenting a suppressor-click less than 8 ms before the test-click. An alteration of the CEOAE level-curve, designated here as temporal suppression, was observed within this time period, and was shown to depend on the levels and the temporal separation of the two clicks. Temporal suppression occurred for all four subjects tested, and resulted in a vertical offset from the unsuppressed level-curve for test-click levels greater than 50 dB peak-equivalent level (peSPL). Temporal suppression was greatest for suppressors presented 1–4 ms before the test click, and the magnitude and time scale of the effect were subject dependent. Temporal suppression was furthermore observed for the short- (i.e., 6–18 ms) and long-latency (i.e., 24–36 ms) regions of the CEOAE, indicating that temporal suppression similarly affects synchronized spontaneous otoacoustic emissions (SSOAEs) and purely evoked CEOAE components. Overall, this study demonstrates that temporal suppression of the CEOAE level-curve reflects a dynamic process in human cochlear processing that works on a time scale of 0–10 ms.

Item Type:	Journal Article
Subjects:	R Medicine > RF Otorhinolaryngology T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:	Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title:	The Journal of the Acoustical Society of America
Publisher:	Acoustical Society of America
ISSN:	0001-4966
Date:	March 2011
Volume:	Vol.129
Number:	No.3
Number of Pages:	11
Page Range:	pp. 1452-1463
Identification Number:	10.1121/1.3531930
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Technical University of Denmark, SNAK Research School, Syddansk Universitet, Denmark, GN ReSound A/S
URI:	http://wrap.warwick.ac.uk/id/eprint/47062

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