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A Review of Acoustic Impedance Matching Techniques for Piezoelectric Sensors and Transducers

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Rathod, Vivek T.·2020·Sensors
DOI 10.3390/s20144051
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Abstract

The coupling of waves between the piezoelectric generators, detectors, and propagating media is challenging due to mismatch in the acoustic properties. The mismatch leads to the reverberation of waves within the transducer, heating, low signal-to-noise ratio, and signal distortion. Acoustic impedance matching increases the coupling largely. This article presents standard methods to match the acoustic impedance of the piezoelectric sensors, actuators, and transducers with the surrounding wave propagation media. Acoustic matching methods utilizing active and passive materials have been discussed. Special materials such as nanocomposites, metamaterials, and metasurfaces as emerging materials have been presented. Emphasis is placed throughout the article to differentiate the difference between electric and acoustic impedance matching and the relation between the two. Comparison of various techniques is made with the discussion on capabilities, advantages, and disadvantages. Acoustic impedance matching for specific and uncommon applications has also been covered.

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Metadata

Authors
Rathod, V. T.
Venue
Sensors
Publisher
MDPI AG
Published
2020-07-21
Volume
20
Issue
14
Pages
4051
ISSN
1424-8220 (ISSN-L)
DOI
10.3390/s20144051
OpenAlex
W3045443807
Cited by
328
References
1
FWCI
15.80
Type
journal article
Language
en
Open access
gold
Licence
creativecommons.org/licenses/by/4.0/ (vor)

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