How can the auditory efferent system protect our ears from noise-induced hearing loss? Let us count the ways

Marshall, Lynne; Miller, Judi A. Lapsley

doi:10.1063/1.4939427

Cited by 3 publications

(2 citation statements)

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“…The same is presumably true for humans, but it is more difficult to study, ultimately requiring experiments in populations already being exposed to high noise levels. The exact mechanism underlying the protective abilities of the medial olivocochlear (MOC) efferent system is unknown, but there are a number of possibilities (reviewed in Marshall and Lapsley Miller, 2014).…”

Section: Introductionmentioning

confidence: 99%

Otoacoustic-emission-based medial-olivocochlear reflex assays for humans

Marshall

Miller

Guinan

et al. 2014

The Journal of the Acoustical Society of America

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Otoacoustic emission (OAE) tests of the medial-olivocochlear reflex (MOCR) in humans were assessed for viability as clinical assays. Two reflection-source OAEs [TEOAEs: transient-evoked otoacoustic emissions evoked by a 47 dB sound pressure level (SPL) chirp; and discrete-tone SFOAEs: stimulus-frequency otoacoustic emissions evoked by 40 dB SPL tones, and assessed with a 60 dB SPL suppressor] were compared in 27 normal-hearing adults. The MOCR elicitor was a 60 dB SPL contralateral broadband noise. An estimate of MOCR strength, MOCR%, was defined as the vector difference between OAEs measured with and without the elicitor, normalized by OAE magnitude (without elicitor). An MOCR was reliably detected in most ears. Within subjects, MOCR strength was correlated across frequency bands and across OAE type. The ratio of across-subject variability to within-subject variability ranged from 2 to 15, with wideband TEOAEs and averaged SFOAEs giving the highest ratios. MOCR strength in individual ears was reliably classified into low, normal, and high groups. SFOAEs using 1.5 to 2 kHz tones and TEOAEs in the 0.5 to 2.5 kHz band gave the best statistical results. TEOAEs had more clinical advantages. Both assays could be made faster for clinical applications, such as screening for individual susceptibility to acoustic trauma in a hearing-conservation program. [http://dx

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Section: Introductionmentioning

confidence: 99%

Otoacoustic-emission-based medial-olivocochlear reflex assays for humans

Marshall

Miller

Guinan

et al. 2014

The Journal of the Acoustical Society of America

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“…The olivocochlear bundle (OCB) is a poorly understood efferent pathway. How it functions and what it does is still being established [9,10,28], which serves to protect the cochlea. It originates in the superior olivary complex in the brainstem and projects to both the ipsilateral and contralateral cochlea.…”

Section: Cochlea and Vestibular Efferents What Are They For?mentioning

confidence: 99%

Critical Cochlea/Vestibular Interactions

Longridge¹

2023

Recent Research on Balance Disorders

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There is a close interaction of the gravity detecting balance organs, the maculae of the saccule and utricle of the inner ear, with the hearing system of the inner ear. The need for this is that although they detect the sensations specific to their own function there is interference with this function due to overlap of wavelengths used by both systems resulting in extraordinary stimulation of the other system for both hearing and balance.

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