Here you will find one or more explanations in English for the word Polyacoustics.
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Polyacoustics
Polyacoustics Pol`y*a*cous"tics, n.
The art of multiplying or magnifying sounds.
Polyacoustic
Polyacoustic Pol`y*a*cous"tic, a. [Poly- + acoustic: cf. F.
polyacoustique.]
Multiplying or magnifying sound. -- n. A polyacoustic
instrument.
Meaning of Polyacoustics from wikipedia