| 摘要 |
PROBLEM TO BE SOLVED: To reduce the noise perceived by the user of a headset. SOLUTION: A headset has an earcup (11) with a front opening adjacent to an annular cushion (15), and the cushion is formed with a plurality of openings (16A) facing the inside of the earcup that acoustically couples the volume of the earcup to the volume of the cushion. A driver (12) is seated inside the earcup with a microphone (17) adjacent to the driver. Active noise reducing circuitry intercouples the driver and the microphone. An acoustic load that may comprise a wire mesh resistive cover (13) and/or air mass adjacent to the microphone is constructed and arranged to reduce the effect of resonance in the earcup volume. COPYRIGHT: (C)2011,JPO&INPIT
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