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    • 56. 发明授权
    • Noise reduction earmuffs system and method
    • US10299962B1
    • 2019-05-28
    • US16186734
    • 2018-11-12
    • Alvin J. Halfaker
    • Alvin J. Halfaker
    • A61F11/14A42B3/16A42B3/30G10K11/178
    • An earmuffs system for noise reduction including an external microphone used in combination with active noise cancellation technology for the reduction of wind or other noises typically experienced while riding a vehicle such as a motorcycle, snow machine or ATV, the earmuffs system including a first earmuff including a first speaker and a first microphone therein; a second earmuff electrically coupled to the first ear muff, the second ear muff including a second speaker and a second microphone therein; noise cancellation circuitry for receiving first sounds from the first microphone and the second microphone and processing the first sounds by in part canceling the first sounds to form a first sound output that is provided from the first speaker and the second speaker; and a third microphone placed external to the first earmuff and to the second earmuff, the third microphone supplying second sounds for the first speaker and the second speaker to output as a second sound output without the second sounds undergoing noise cancellation processing.