Development of laboratory-based test methods for the comparative evaluation of performance of advanced hearing protection devices

计算机科学 指向性 音质 听力保护 脉冲(物理) 脉冲噪声 助听器 脉冲响应 声学 噪音(视频) 听力损失 语音识别 电信 听力学 人工智能 医学 数学分析 物理 像素 数学 量子力学 天线(收音机) 图像(数学)
作者
Theodore F. Argo,Brian Zadler,Cortney LeNeave,Jennifer Jerding
出处
期刊:Proceedings of Meetings on Acoustics 卷期号:: 040010-040010
标识
DOI:10.1121/2.0000620
摘要

Standard acoustic test methods may not fully capture the performance characteristics of advanced passive and active hearing protection devices. Development of laboratory-based test methods and metrics with the ability to discriminate between the performance characteristics of these devices, such as level-dependent or nonlinear effects, without the use of human subjects was undertaken. Measurements of hearing protection device performance with respect to signal quality, sound localization, self-noise, and impulse response were performed. Signal quality and sound localization were tested using a compact 3D positioning apparatus, which gave us directivity information without the use of human subjects or a large hemispherical speaker array. A sound isolation box was used for self-noise, impulse response, and level-dependent frequency response measurements. Results of the impulse tests were compared to freefield shock tube results to ensure consistency among methods. This new evaluation methodology, when performed on an array of advanced hearing protection devices, can provide supplemental or alternative performance data for the relative comparison of devices under test. The results allow for distinction between devices based on preferred characteristics; for example, low self-noise and good signal quality favored over better impulse protection.
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