研究一种用于测试体腔换能器的紧凑型体模及测试装置。
Investigating a compact phantom and setup for testing body sound transducers.
机构信息
Department of Pediatrics, Rush University, 1725 W Harrison Street, Suite 946, Chicago, IL 60612, USA.
出版信息
Comput Biol Med. 2011 Jun;41(6):361-6. doi: 10.1016/j.compbiomed.2011.03.014. Epub 2011 Apr 14.
Abstract
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.
摘要
换能器是涉及体声实验的关键元件。这些设备的特性往往无法准确获知。目前尚无针对这些传感器的标准化校准设置或程序。本研究调查了一种新的计算机控制声源仿体用于测试传感器的特性。结果表明，不同尺寸的传感器需要特殊的仿体要求。研究了某些方法对增加仿体表面信号的空间和频谱均匀性的有效性。可以去除大于 20dB 的非均匀性，这对于更准确地比较不同尺寸传感器的特性特别有帮助。
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