真实耳朵以及声学和电学模型中的侧支和平行通气效应。

Side branch and parallel vent effects in real ears and in acoustical and electrical models.

作者信息

Studebaker G A, Cox R M

出版信息

J Am Audiol Soc. 1977 Sep-Oct;3(2):108-17.

Abstract

The purpose of the project was to demonstrate and explain the acoustic effects of side branch and parallel vents in individual real ears. It was shown that parallel and side branch vents produce similar low frequency filtering effects and vent-associated reactance resonances. However, when the input system incorporates a side branch vent the sound pressure produced in the ear canal at frequencies above the vent-associated resonance is less than that produced when the input system is unvented. This effect is not seen when the input system is associated with a parallel vent. Data obtained in the real ear canals were compared to analogous measurements made using an acoustical model (the Zwislocki coupler) and an electrical model designed to simulate the hearing aid receiver, input tubing, earmold, ear canal, and eardrum. Both models yielded data very similar to the real ear results. The advantages of each model in predicting the effects of individual earmold vents are discussed.

摘要

该项目的目的是展示并解释个体真实耳朵中侧支通气孔和平行通气孔的声学效应。结果表明，平行通气孔和侧支通气孔会产生相似的低频滤波效应以及与通气孔相关的电抗共振。然而，当输入系统包含一个侧支通气孔时，在通气孔相关共振频率以上的耳道中产生的声压小于输入系统未通气时产生的声压。当输入系统与平行通气孔相关联时，不会出现这种效应。将在真实耳道中获得的数据与使用声学模型（兹维兹洛茨基耦合器）和设计用于模拟助听器接收器、输入管道、耳模、耳道和鼓膜的电气模型进行的类似测量进行了比较。两种模型得出的数据与真实耳朵的结果非常相似。讨论了每种模型在预测个体耳模通气孔效应方面的优势。