| 摘要 |
PROBLEM TO BE SOLVED: To provide an active noise reduction head set, which is provided with active noise reduction and talkthrough, and switching circuits related them. SOLUTION: The noise reduction head set has an active noise reduction signal processing path to provide active noise reduction, a talkthrough signal processing path to provide talkthrough functions, and switching elements not to allow either or both of the noise reduction signal path and the talkthrough signal path to be used. COPYRIGHT: (C)2006,JPO&NCIPI
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