TREA

in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means

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Industry

  • CPC
  • H04R1/38
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Parent Industries

HELECTRICITY H04Electric communication H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS DEAF-AID SETS PUBLIC ADDRESS SYSTEMS H04R1/00Details of transducers, loudspeakers or microphones

Current Industry

H04R1/38in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means
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