Absolute sensitivity limits of various ultrasonic transducers
Open Access
- 19 November 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 2 (10510117) , 951-954
- https://doi.org/10.1109/ultsym.1995.495721
Abstract
We compare the calculated and measured sensitivities of wide-band, ultrasonic transducers: optical interferometers, air-coupled capacitive transducers, electromagnetic acoustic transducers (EMATs), and contact piezoelectric transducers. In the case of ideal (lossless) sensors we find that air-coupled, EMAT and contact piezoelectric sensors all exhibit increased sensitivities over that of optical transducers. We then describe a procedure for measuring such sensitivity limits and validate the procedure by determining the sensitivity limit of a contact piezoelectric transducer.Keywords
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