Yang Liuqing, Zhang Jun
Hangzhou Applied Acoustics Research Institute, Hangzhou, Zhejiang 311400, China.
Qingdao Innovation and Development Base, Harbin Engineering University, Qingdao, Shandong 266000, China.
J Acoust Soc Am. 2024 Aug 1;156(2):1041-1047. doi: 10.1121/10.0028194.
A self-reciprocity method is described for calibrating a spherical transducer in a spherical shell. The reciprocity constant is calculated using Green's function and the electroacoustic reciprocal principle in the spherical shell. A sensitivity correction is developed by calculating the transducer's receiving force in different fields. An experimental measurement setup is described to calibrate transducers with diameters of 20 and 30 mm in the frequency range from 25 to 63 kHz, calibrated in a 500 mm diameter spherical shell with a thickness of 2 mm. The largest discrepancy in calibration results between the self-reciprocity and three-transducer spherical-wave reciprocity method is around -1.4 dB. The self-reciprocity calibration method, with a smaller volume required than the three-transducer spherical-wave reciprocity method, has a potential advantage in calibrating the transducer at high hydrostatic pressure and varying water temperatures.
描述了一种用于在球壳中校准球形换能器的自互易方法。互易常数是利用格林函数和球壳中的电声互易原理计算得出的。通过计算换能器在不同场中的接收力来进行灵敏度校正。描述了一种实验测量装置，用于在25至63kHz频率范围内校准直径为20mm和30mm的换能器，该校准在直径500mm、厚度2mm的球壳中进行。自互易法与三换能器球面波互易法校准结果的最大差异约为-1.4dB。自互易校准方法所需体积比三换能器球面波互易法小，在高静水压力和变化水温下校准换能器方面具有潜在优势。
