ATTENTUATION OF THE OUTPUT SIGNAL BY PROTECTIVE AND FIXING TOOLS FOR HEARING AIDS AND COCHLEAR IMPLANTS

IF 0.1 Q4 ACOUSTICS Akustika Pub Date : 2021-01-01 DOI:10.36336/akustika202141163

Sergei Levin, G. Tufatulin, I. Koroleva, Viktoriia Vasilyeva, E. Levina

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Abstract

The aim was to study amount of attenuation of input signal at the hearing aid (HA) or cochlear implant sound processor (SP) microphone by different protective tools or clothes. Materials and methods. The acoustic measurements were conducted in the soundproof cabin using artificial head with HA/SP and different protective tools, which can influence on microphone function. Probe microphone was integrated in the microphone input of SP and connected with HA verification system. Results. The biggest amount of signal attenuation was observed using water-resistant cases for SP. Changes affect the speech spectrum, therefore using such protective tools can lead to decrease of speech intelligibility. Maximum attenuation was 9.36±0.33 dB at 4000 Hz. Non-hermetic membrane protective cases gave maximum attenuation 7.67±0.18 dB (5000 Hz). Clothes which cover head lead to significant change of signal at microphone up to 9.24±0.16 dB mostly at high-frequencies, which less influences on speech intelligibility. The results confirm that clothes and protective tools for HA of SP show significant attenuation of sounds.

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助听器和人工耳蜗植入用保护和固定工具对输出信号的衰减

目的是研究不同防护工具或衣物对助听器(HA)或人工耳蜗声音处理器(SP)麦克风输入信号的衰减量。材料和方法。声学测量在隔声舱内进行，使用带有HA/SP的人工头和不同的保护工具，这些工具会影响麦克风的功能。探头麦克风集成在SP的麦克风输入端，并与HA验证系统相连。结果。使用防水保护套的SP观察到最大的信号衰减。变化会影响语音频谱，因此使用这种保护工具会导致语音清晰度下降。4000 Hz时最大衰减为9.36±0.33 dB。非密封膜保护箱最大衰减7.67±0.18 dB (5000 Hz)。遮盖头部的衣服会导致麦克风处信号发生显著变化，最大变化幅度为9.24±0.16 dB，主要发生在高频，但对语音清晰度的影响较小。研究结果证实，SP的HA防护服和防护工具对声音有明显的衰减。

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Akustika ACOUSTICS-

CiteScore

0.80

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0.00%

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