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Articles

Generation and detection of broadband airborne ultrasound with cellular polymer ferroelectrets

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By Ivan R. Minev, Ingrid Graz, Mario Dansachmüller, Petr Bartu
| tu-dresden.de
Cellular polypropylene ferroelectrets are useful for broadband airborne ultrasound generation and detection up to the fundamental thickness extension resonance. The authors show that the coupling of ferroelectrets to air alters the electromechanical resonance of the foam. In an acoustical cavity, Fabry-Perot resonances are obtained, which is in excellent agreement with the plane wave model calculations.
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