TREA

Transducers other than those covered by groups H04R9/00 - H04R21/00

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Industry

  • CPC
  • H04R23/00
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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

Current Industry

H04R23/00Transducers other than those covered by groups H04R9/00 - H04R21/00

Sub Industries

H04R23/002using electrothermic-effect transducer H04R23/004using ionised gas H04R23/006using solid state devices H04R23/008using optical signals for detecting or generating sound H04R23/02Transducers using more than one principle simultaneously
Industries