NASA NTRS · 19800000078
Broadband electrostatic acoustic transducer for liquids
Abstract
Capacitive electrostatic transducer (ESAT) measures absolute displacement amplitudes of ultrasonic waves in liquids, and may be used as calibrator for other transducers or as probe for nondestructive study and characterization of materials. ESAT consists of thin conductive membrane stretched over metallic housing. Ultrasonic waves incident on membrane cause it to vibrate and generate signal proportional to wave amplitude. Entire assembly is sealed for immersion in liquid.
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Cantrell, J. H., Heyman, J. S., Breazeale, M. A., Torbett, M. A., Yost, W. T.. 1980-08-01. Broadband electrostatic acoustic transducer for liquids. https://ntrs.nasa.gov/citations/19800000078
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