Witte Russell S, Hall Tim, Olafsson Ragner, Huang Sheng-Wen, O'Donnell Matthew
J Appl Phys. 2008;104(5):54701. doi: 10.1063/1.2974622.
We describe an inexpensive alternative to conventional hydrophones for measuring ultrasonic fields. The hydrophone, composed of common laboratory supplies, depends on the acoustoelectric (AE) effect, a well-known interaction between electrical current and pressure. Beam patterns of a 540 kHz annular transducer captured using a bowtie graphite hydrophone were consistent with patterns obtained using conventional, more expensive hydrophones. The AE signal was proportional to both the applied bias current (1.83 µV/mA) and pressure (13.3 µV/MPa) with sensitivity better than 50 kPa. Disposable AE hydrophones may be an attractive alternative for clinical applications that require close monitoring of high intensity acoustic fields.
我们描述了一种用于测量超声场的传统水听器的廉价替代方案。这种水听器由常见的实验室用品组成，依赖于声电（AE）效应，即电流与压力之间一种众所周知的相互作用。使用领结形石墨水听器捕获的540kHz环形换能器的波束图与使用传统的、更昂贵的水听器获得的波束图一致。AE信号与施加的偏置电流（1.83µV/mA）和压力（13.3µV/MPa）均成正比，灵敏度优于50kPa。一次性AE水听器对于需要密切监测高强度声场的临床应用可能是一种有吸引力的替代方案。
