Abstract

A hardware–software complex has been designed for ipsilateral measurements of the acoustic reflex by determining the resonant frequency of the external auditory canal, which changes due to an involuntary contraction of the middle-ear muscles in response to high-intensity sounds. A modified two-microphone method was used to determine the resonance characteristics of the external auditory canal. Measuring the sound pressure and the phase difference of acoustic vibrations in two cross sections of a waveguide, which is hermetically connected to the external auditory canal, allows determination of the necessary acoustic characteristics in a given frequency range. The software allows one to automatically generate a test polyharmonic signal and control the amplitude of a stimulating signal and, based on the results of processing the measured data, calculate the frequency-dependent reflection coefficients, absorption coefficients, and components of the acoustic impedance of the external auditory canal. The fundamental features of the complex are the absence of the need to create a stationary overpressure in the external auditory canal, as well as the provision of a direct measurement of the impedance of the external auditory canal in the audio-frequency range with any specified step.

中文翻译：

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用于同侧声反射阈值测量的硬件-软件复合体

摘要

通过确定外耳道的共振频率，设计了一个硬件 - 软件复合体，用于声反射的同侧测量，由于中耳肌肉响应高强度声音而发生不自主收缩而发生变化。使用改进的双麦克风方法来确定外耳道的共振特性。测量与外耳道密封连接的波导的两个横截面中的声压和声振动相位差，可以确定给定频率范围内必要的声学特性。该软件允许人们自动生成测试多谐波信号并控制刺激信号的幅度，并根据处理测量数据的结果，计算频率相关的反射系数、吸收系数和外耳道声阻抗的分量。该复合体的基本特征是不需要在外耳道中产生固定的超压，以及在音频范围内提供任何指定步骤的外耳道阻抗的直接测量.