Investigating a compact phantom and setup for testing body sound transducers.

Investigating a compact phantom and setup for testing body sound transducers.
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DOI:
10.1016/j.compbiomed.2011.03.014
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发表时间:
2011-06
影响因子:
7.7
通讯作者:
Sandler, Richard H.
Sandler, Richard H.
中科院分区:
工程技术2区
文献类型:
--
作者:
Mansy, Hansen A.;Grahe, Joshua;Royston, Thomas J.;Sandler, Richard H.

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接触换能器是涉及体音的实验中的一个关键元素。这些设备的特性通常不能准确地知道。没有标准化的校准设置或程序来测试这些传感器。本研究调查了一种用于测试传感器的新型计算机控制声源体模的特性。结果表明,不同尺寸的传感器需要特殊的体模要求。研究了某些方法在提高体模表面信号的空间和光谱均匀性方面的有效性。不均匀>20分贝是可移除的,这对于更准确地比较不同尺寸传感器的特性特别有帮助。
Contact transducers are a key element in experiments involving body sounds. The characteristics of these devices are often not known with accuracy. There are no standardized calibration setups or procedures for testing these sensors. This study investigated the characteristics of a new computer-controlled sound source phantom for testing sensors. Results suggested that sensors with different sizes require special phantom requirements. The effectiveness of certain approaches on increasing the spatial and spectral uniformity of the phantom surface signal was studied. Non-uniformities >20 dB were removable, which can be particularly helpful in comparing the characteristics of different size sensors more accurately.
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