Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
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2227/00
Details of public address [PA] systems covered by H04R27/00 but not provided for in any of its subgroups
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H04R2227/009
Signal processing in [PA] systems to enhance the speech intelligibility
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