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Filtering to Match Hearing Aid Insertion Gain to Individual Ear Acoustics

机译：进行过滤以使助听器的插入增益与单个耳朵的声音相匹配

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摘要

When hearing aid gain is prescribed by software, gain is calculated based on the average acoustics for the age of patient, gender, mold type, and so on. The acoustics of the individual's ear often vary from the average values, so there will be a mismatch between the prescribed gain and the real-ear gain. Real-ear measurement can be used to verify the gain and adjust it to meet targets, but the quality of the match will be limited by the number of channels and the flexibility of the hearing aid. A potential way to improve this process is to generate a filter that compensates for variations in real-ear insertion gain due to individual ear acoustics. Such a filter could be included in the processing path of a digital hearing aid. This article describes how such a filter can be generated using the windowing method, and the principle is demonstrated in a real ear. The approach requires communication between the real-ear measurement and hearing aid programming software. A finite impulse response filter with group delay just over 2 ms matched insertion gain to target values within the acceptable tolerance defined by British Society of Audiology guidelines.
机译：当通过软件规定助听器增益时，将根据患者年龄，性别，发霉类型等的平均声音来计算增益。个人耳朵的声学效果通常与平均值有所不同，因此规定的增益和实际的耳朵增益之间将不匹配。可以使用实耳测量来验证增益并对其进行调整以达到目标，但是匹配的质量将受到通道数量和助听器灵活性的限制。改进此过程的一种潜在方法是生成一个滤波器，该滤波器可以补偿由于各个耳朵的声音而导致的实际入耳增益的变化。这样的滤波器可以被包括在数字助听器的处理路径中。本文介绍了如何使用开窗方法生成这样的滤波器，并在真实的耳朵中演示了该原理。该方法需要在实耳测量和助听器编程软件之间进行通信。组延迟刚好超过2 ms的有限脉冲响应滤波器将插入增益与目标值相匹配，且目标值在英国听觉学会指南规定的可接受公差内。

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