title: Methods to calibrate the absolute receive sensitivity of single-element, focused transducers.
abstract: 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.
authors.affiliation: Biomedical Engineering Program, University of Cincinnati, Cincinnati, Ohio 45267, USA richkt@mail.uc.edu, doug.mast@uc.edu.
authors.forename: Kyle T
authors.initials: KT
authors.lastname: Rich
authors.affiliation: Biomedical Engineering Program, University of Cincinnati, Cincinnati, Ohio 45267, USA richkt@mail.uc.edu, doug.mast@uc.edu.
authors.forename: T Douglas
authors.initials: TD
authors.lastname: Mast
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D002138:Calibration; D004867:Equipment Design; D008962:Models, Theoretical; D009038:Motion; D009716:Numerical Analysis, Computer-Assisted; D011312:Pressure; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013018:Sound Spectrography; D013997:Time Factors; D014160:Transducers, Pressure / Q000592:standards*