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Open Access A Preceding Sound Expedites Medial Olivocochlear Reflex

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The current study investigated the effect of a preceding sound on the medial olivocochlear reflex (MOCR), which is a sound-activated feedback response that controls the input to the auditory system. We used 60- and 40-dB noise and a 40-dB tone burst as preceding sounds, and evaluated their effects on the time course and strength of the MOCR. The MOCR was assessed non-invasively in terms of the suppression of otoacoustic emissions induced by contralateral acoustic stimulation. We found that (1) all the preceding sounds we used, regardless of whether they induced an MOCR by themselves, expedited the MOCR by up to 90 ms, and (2) a 60-dB-preceding-noise, which itself induces an MOCR, not only expedites but also enhances the MOCR.

© 2018 The Author(s). Published by S. Hirzel Verlag · EAA. This is an open access article under the terms of the Creative Commons Attribution (CC BY 4.0) license (

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Document Type: Research Article

Publication date: September 1, 2018

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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