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Title:

Broadband Air-Coupled Ultrasound Emitter and Receiver Enable Simultaneous Measurement of Thickness and Speed of Sound in Solids

Document type:
Zeitschriftenaufsatz
Author(s):
Bente, K.; Rus, J.; Mooshofer, H.; Gaal, M.; Grosse, C.U.
Abstract:
Air-coupled ultrasound sensors have advantages over contact ultrasound sensors when a sample should not become contaminated or influenced by the couplant or the measurement has to be a fast and automated inline process. Thereby, air-coupled transducers must emit high-energy pulses due to the low air-to-solid power transmission ratios (10−3 to 10−8). Currently used resonant transducers trade bandwidth—a prerequisite for material parameter analysis—against pulse energy. Here we show that a combina...     »
Keywords:
thermoacoustic emitter; optical microphone; air-coupled ultrasound; local resonance; thickness measurement; thickness resonance
Journal title:
Sensors
Year:
2023
Journal volume:
23(3)
Quarter:
1. Quartal
Month:
Jan
Journal issue:
1379
Reviewed:
ja
Language:
en
Fulltext / DOI:
doi:10.3390/s23031379
Publisher:
MDPI and ACS Style
Date of publication:
26.01.2023
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