A practical device to determine the reflection coefficient of acoustic materials in-situ based on a Microflown and microphone sensor
A practical device to determine the reflection coefficient of acoustic materials in-situ based on a Microflown and microphone sensor
复制标题
基于 Microflown 和麦克风传感器的原位声学材料反射系数实用装置
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
G. Vermeir
中科院分区：
文献类型：
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作者：
R. Lanoye;H. D. Bree;W. Lauriks;G. Vermeir
吸声材料的反射系数常在驻波管中测量。这种方法有一些缺点。本文提出了一种不使用驻波管、能在现场、真实的时间、倾斜地快速测定反射系数的新方法。该方法是基于同时测量法向声质点速度和声压在同一位置。这些值通过使用Microflood（Titan传感器元件）和声压麦克风来确定。理论提出和验证测量的支持。
The reflection coefficient of acoustic absorbing materials is often measured in a standing wave tube. This method has some drawbacks. Here a novel technique, that is capable to determine the reflection coefficient in a fast way in-situ, real time, oblique and without the use of a standing wave tube, is presented. The method is based on the simultaneous measurement of normal acoustical particle velocity and sound pressure at the same position. These values are determined with the use of a Microflown (Titan sensor-element) and a sound pressure microphone. Theory is presented and supported by verifying measurements.