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    • 7. 发明授权
    • Active noise reduction headphone
    • 主动降噪耳机
    • US09565492B2
    • 2017-02-07
    • US15232352
    • 2016-08-09
    • Bose Corporation
    • Martin Ring
    • H04R1/10G10K11/178
    • H04R1/1083G10K11/178G10K11/17857G10K11/17881G10K2210/1081
    • An active noise reduction earphone includes a speaker, a plurality of microphones and a feedback system. Each microphone is displaced from the speaker and the other microphones, and each microphone generates a microphone signal responsive to received acoustic noise. The feedback system receives a combination of the microphone signals and generates an inverse noise signal that is applied to the speaker. The speaker generates an inverse acoustic noise signal that substantially cancels the acoustic noise signal at a predetermined location relative to the speaker and the microphones. The feedback system can include a microphone signal combiner in communication with the microphones. The microphone signal combiner generates a signal that may be a sum or weighted sum of the microphone signals and can be used to generate the inverse noise signal. The earphone has an increased noise reduction bandwidth and improved cancellation capability relative to conventional earphones.
    • 有源降噪耳机包括扬声器,多个麦克风和反馈系统。 每个麦克风从扬声器和其他麦克风移位,并且每个麦克风响应于接收的声学噪声产生麦克风信号。 反馈系统接收麦克风信号的组合,并产生施加到扬声器的反相噪声信号。 扬声器产生相对于扬声器和麦克风的预定位置处的声音噪声信号基本上消除的反声噪声信号。 反馈系统可以包括与麦克风通信的麦克风信号组合器。 麦克风信号组合器产生可以是麦克风信号的和或加和的信号,并且可以用于产生反相噪声信号。 相对于传统的耳机,耳机具有增加的降噪带宽和改进的取消能力。