US PATENT SUBCLASS 381 / 59
.~ Loudspeaker operation
Current as of:
June, 1999
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381 /
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ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES
58
DF
MONITORING/MEASURING OF AUDIO DEVICES
{2}
59
.~ Loudspeaker operation
DEFINITION
Classification: 381/59
Loudspeaker operation:
(under subclass 58) Subject matter where an operating parameter of a sound reproducing transducer is measured or indicated.