Rich Kyle T, Mast T Douglas
Biomedical Engineering Program, University of Cincinnati, Cincinnati, Ohio 45267, USA
J Acoust Soc Am. 2015 Sep;138(3):EL193-8. doi: 10.1121/1.4929620.
Absolute pressure measurements of acoustic emissions by single-element, focused passive cavitation detectors would be facilitated by improved wideband receive calibration techniques. Here, calibration methods were developed to characterize the absolute, frequency-dependent receive sensitivity of a spherically focused, single-element transducer using pulse-echo and pitch-catch techniques. Validation of these calibration methods on a focused receiver were made by generating a pulse from a small diameter source at the focus of the transducer and comparing the absolute pressure measured by a calibrated hydrophone to that of the focused transducer using the receive sensitivities determined here.
改进的宽带接收校准技术将有助于通过单元素聚焦被动空化探测器进行声发射的绝对压力测量。在此，开发了校准方法，以使用脉冲回波和音高捕捉技术来表征球形聚焦单元素换能器的绝对频率相关接收灵敏度。通过在换能器焦点处的小直径源产生脉冲，并使用此处确定的接收灵敏度，将校准水听器测量的绝对压力与聚焦换能器的绝对压力进行比较，从而对聚焦接收器上的这些校准方法进行验证。
