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使用听觉稳态反应来测量听力保护器的堵塞效应。

Using auditory steady-state responses for measuring hearing protector occlusion effect.

作者信息

Valentin Olivier, Laville Frédéric

机构信息

Department of Mechanical Engineering, École de technologie supérieure, Université du Québec, Montréal, Québec, Canada.

出版信息

Noise Health. 2017 Nov-Dec;19(91):278-285. doi: 10.4103/nah.NAH_13_17.

DOI:10.4103/nah.NAH_13_17
PMID:29319012
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5771060/
Abstract

INTRODUCTION

The currently available methods for measuring the occlusion effect (OE) of hearing protection devices (HPDs) have limitations. Objective microphonic measurements do not assess bone-conducted sounds directly transmitted to the cochlea. Psychophysical measurements at threshold are biased due to the low-frequency masking effects from test participants' physiological noise and the variability of measurements based on subjective responses. An auditory steady-state responses (ASSRs) procedure is used as a technique that might overcome these limitations.

PARTICIPANTS AND METHODS

Pure-tone stimuli (250 and 500 Hz), with amplitude modulated at 40 Hz, were presented to twelve adults with normal hearing through a bone vibrator at three levels in 10-dB steps. The following two conditions were assessed: the unoccluded ear canal and occluded ear canal. ASSR amplitude data as a function of the stimulation level were linearized using least-square regressions. The ASSR-based "physiological" OE was then calculated as the average difference between the two measurements.

RESULTS

A significant statistical difference was found between the average threshold-based psychophysical OE and the average ASSR-based OE.

CONCLUSION

This study successfully ascertained that it is possible to objectively measure the OE of HPD using ASSRs collected on the same participant both with and without protectors.

摘要

引言

目前用于测量听力保护装置（HPD）阻塞效应（OE）的方法存在局限性。客观微音器测量无法直接评估直接传输到耳蜗的骨导声音。阈值处的心理物理学测量存在偏差，这是由于测试参与者生理噪声产生的低频掩蔽效应以及基于主观反应的测量变异性所致。听觉稳态反应（ASSR）程序被用作一种可能克服这些局限性的技术。

参与者与方法

通过骨振器以10 dB步长的三个水平向12名听力正常的成年人呈现40 Hz调幅的纯音刺激（250和500 Hz）。评估了以下两种情况：未阻塞的耳道和阻塞的耳道。使用最小二乘法回归将作为刺激水平函数的ASSR幅度数据线性化。然后将基于ASSR的“生理”OE计算为两次测量之间的平均差异。

结果

发现基于阈值的平均心理物理学OE与基于ASSR的平均OE之间存在显著统计学差异。

结论

本研究成功确定，使用在佩戴和不佩戴保护器的同一参与者身上收集的ASSR可以客观测量HPD的OE。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/62e6/5771060/b90d417f163e/NH-19-278-g007.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/62e6/5771060/b90d417f163e/NH-19-278-g007.jpg
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A model of the occlusion effect with bone-conducted stimulation.骨传导刺激下的咬合效应模型。
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