Patent classifications
G
PHYSICS
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G10
MUSICAL INSTRUMENTS; ACOUSTICS
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G10K
SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
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2210/00
Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
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G10K2210/108
Communication systems, e.g. where useful sound is kept and noise is cancelled
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G10K2210/1082
Microphones, e.g. systems using "virtual" microphones
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