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首页> 外文会议>Brazilian Congress on Biomedical Engineering >Concurrent Acoustical Feedback and Occlusion-Effect Cancellation in Hearing Aids: A Simulation-Based Analysis
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Concurrent Acoustical Feedback and Occlusion-Effect Cancellation in Hearing Aids: A Simulation-Based Analysis

机译：在助听器中并发声学反馈和闭塞效应取消：基于模拟的分析

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摘要

Occlusion-effect and acoustic feedback are common complaints of the hearing aid user. The occlusion effect is described as an annoying quality of the user's own voice that sounds hollow or boomy, while feedback instability results in an unpleasant loud continuous tone. Despite the availability of high performance feedback cancellers, severe to profound losses require large amplification and, as a result, certain degree of occlusion to minimize feedback. The smaller the vent, the greater is the feedback-path magnitude attenuation as well as the increase in the occlusion effect. This work presents a numerical simulation investigation about the concurrent use of the prediction-error-method feedback canceller and the feedforward-occlusion canceller in hearing aid applications. Evidences about mutual performance impact on both cancellers are pursued. The studied scenario takes into consideration three sizes of the ventilation opening of the hearing aids. Simulation results indicate that the individual performance of both cancellers is not affected when the stability is preserved. This finding can be of interest for hearing aid designers when setting up the canceller parameters.
机译：闭塞效应和声反馈是助听器用户的常见投诉。闭塞效应被描述为用户自己的声音的令人讨厌的质量，这些声音听起来是空心的或蓬勃的，而反馈不稳定会导致令人不快的响亮的持续色调。尽管有高性能反馈消除渠道，但严重的深刻损失需要大放大，因此，一定程度的闭塞以最小化反馈。通风口越小，反馈路径幅度衰减越大以及闭塞效应的增加。该工作提出了关于助听器应用中预测误差方法反馈消除器和馈电闭塞消除器的同时使用的数值模拟研究。追求关于对两个消除渠道的相互性能影响的证据。所研究的场景考虑了三种尺寸的助听器的通风开口。仿真结果表明，当保存稳定性时，两个消除器的个性性能都不会受到影响。在设置取消器参数时，此发现可能对助听器设计师感兴趣。

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