通过双负载法对助听器传声器级联参数进行实验测定。

Experimental determination of cascade parameters of a hearing-aid microphone via the two-load method.

作者信息

Egolf D P, Haley B T, Bauer K M, Howell H C, Larson V D

机构信息

Department of Electrical Engineering, University of Wyoming, Laramie 82071.

出版信息

J Acoust Soc Am. 1988 Jun;83(6):2439-46. doi: 10.1121/1.396323.

DOI:10.1121/1.396323

PMID:3411033

Abstract

Presented in this article is a computer-aided experimental method for obtaining the cascade parameters of the two-port model of a miniature hearing-aid microphone. The method is an adaptation of the "two-load" method [D.P. Egolf and R.G. Leonard, J. Acoust. Soc. Am. 62, 1013-1023 (1977)] to acoustoelectric, rather than electroacoustic, transducers. The cascade parameters of a particular microphone, determined by this method, were within 2.5 dB of the manufacturer's published open-circuit sensitivity data. In an attempt to further verify the numerical cascade-parameter data, a two-port model of the microphone was used to simulate experimental voltages developed across two different complex electrical load impedances attached to the microphone. The results showed experimental/simulation differences of no greater than 3.0 dB at any frequency. The two-port microphone model and associated cascade parameters are currently being incorporated into a computer-based plan for mathematical simulation of an entire in situ hearing aid.

摘要

本文介绍了一种用于获取微型助听器麦克风二端口模型级联参数的计算机辅助实验方法。该方法是对“双负载”方法[D.P. 埃高尔夫和R.G. 伦纳德，《美国声学学会杂志》62，1013 - 1023（1977）]的改编，用于声电换能器而非电声换能器。通过该方法确定的特定麦克风的级联参数与制造商公布的开路灵敏度数据相差在2.5分贝以内。为了进一步验证数值级联参数数据，使用麦克风的二端口模型来模拟连接到麦克风的两个不同复用电负载阻抗两端产生的实验电压。结果表明，在任何频率下，实验值与模拟值的差异不超过3.0分贝。目前，二端口麦克风模型及相关级联参数正被纳入一个基于计算机的计划，用于对整个原位助听器进行数学模拟。