Long-term sound conditioning increases distortion product otoacoustic emission amplitudes and decreases olivocochlear efferent reflex strength.

Abstract:

:The cochlea can be protected from acoustic trauma by moderate-level sound exposure. It is suggested that olivocochlear system may play a significant role in this protection. This study was performed to investigate distortion product otoacoustic emission (DPOAE) amplitudes changes and the efficiency of contralateral noise stimulation on DPOAE after conditioning noise exposure. Our results demonstrate that long-term conditioning can increase the DPOAE amplitudes at low frequencies (1.0-3.0 kHz) and decrease the olivocochlear efferent reflex strength at the same frequencies. The DPOAE amplitudes are partially restored to the preconditioning levels 2 weeks after conditioning; contralateral suppression also returns to the preconditioning levels. These results suggest that the enhancement of DPOAE amplitudes might be due to a decrease in olivocochlear efferent reflex strength.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Peng JH,Tao ZZ,Huang ZW

doi

10.1097/WNR.0b013e32820049a8

subject

Has Abstract

pub_date

2007-07-16 00:00:00

pages

1167-70

issue

11

eissn

0959-4965

issn

1473-558X

pii

00001756-200707160-00016

journal_volume

18

pub_type

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