Gavrilov L R, Dmitriev V N, Solontsova L V
N.N. Andreev Acoustic Institute, USSR Academy of Sciences, Moscow.
J Acoust Soc Am. 1988 Mar;83(3):1167-79. doi: 10.1121/1.396061.
The feasibility of using a focusing ultrasonic transducer as a sound pressure receiver is discussed. It is shown theoretically that, at certain angular apertures of the receiver, its output signal is proportional to the sound pressure in the field point coincident with the receiver center of curvature. The receivers of this type have been demonstrated suitable for remote measurements of field spatial distribution of plane and focused ultrasonic radiators. Data are presented on the experimental testing of focused receivers in measuring acoustic fields in water, air, and certain samples of biological tissues. The instruments are sufficiently universal and allow the measurement not only of acoustic fields, but also of temperature increments in locally heated media, as well as permit one to follow the initiation and development of ultrasonic cavitation and study nonlinear effects. The remote sensing ability and high sensitivity of focused ultrasonic receivers allow their practical use in biomedical acoustics for noninvasive measurements.
讨论了使用聚焦超声换能器作为声压接收器的可行性。从理论上表明，在接收器的特定角孔径下，其输出信号与与接收器曲率中心重合的场点处的声压成正比。已证明这种类型的接收器适用于远程测量平面和聚焦超声辐射器的场空间分布。给出了聚焦接收器在水、空气和某些生物组织样本中测量声场的实验测试数据。这些仪器足够通用，不仅可以测量声场，还可以测量局部加热介质中的温度增量，并且可以跟踪超声空化的产生和发展以及研究非线性效应。聚焦超声接收器的遥感能力和高灵敏度使其能够在生物医学声学中实际用于无创测量。
