| http://www.w3.org/ns/prov#value | - a) piezoceramic transducers, b) Polyvinyldine Flouride (PVDF) actuators, c) Mylar sheets, d) vibrating panels with specific modal distributions, e) standard electroacoustic transducers, with various responses, including frequency, amplitude, and other responses, sufficient for the specific requirements (e.g., over a frequency range from about 20 Hz to about 20 kHz.
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