超声学.用自互易法测量球形弯曲换能器的电声参数和声输出功率

[中文适用范围]： 本文件是一项技术规范，a) 建立了用于超声换能器校准的自由场会聚球面波互易法；b) 建立了使用互易法确定换能器电声参数和声输出功率所需的测量条件和实验程序；c) 建立了检查这些换能器互易性和聚焦场线性范围的标准；d) 提供了评估辐射导纳总体测量不确定度的指导信息。本文件适用于：i) 无中心孔的圆形球形凹面聚焦换能器，工作在线性振幅范围内；ii) 频率范围 0.5 MHz 至 15 MHz；iii) 聚焦场内的声压振幅处于线性振幅范围内。 [外文原描述]： IEC TS 62903:2018, which is a Technical Specification, a) establishes the free-field convergent spherical wave self-reciprocity method for ultrasonic transducer calibration, b) establishes the measurement conditions and experimental procedure required to determine the transducer's electroacoustic parameters and acoustic output power using the self-reciprocity method, c) establishes the criteria for checking the reciprocity of these transducers and the linear range of the focused field, and d) provides guiding information for the assessment of the overall measurement uncertainties for radiation conductance. This document is applicable to: i) circular spherically curved concave focusing transducers without a centric hole working in the linear amplitude range, ii) measurements in the frequency range 0,5 MHz to 15 MHz, and iii) acoustic pressure amplitudes in the focused field within the linear amplitude range.