发明申请
- 专利标题: NOISE REDUCTION SYSTEM FOR AN ELECTRICALLY POERED AUTOMOTIVE VEHICLE
- 专利标题(中): 用于电动汽车的噪声减少系统
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申请号: US12885939申请日: 2010-09-20
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公开(公告)号: US20120070012A1公开(公告)日: 2012-03-22
- 发明人: Takashi Yoshizawa , Harsha Badarinarayan , Donald J. McCune , Akira Inoue
- 申请人: Takashi Yoshizawa , Harsha Badarinarayan , Donald J. McCune , Akira Inoue
- 申请人地址: JP Tokyo
- 专利权人: Hitachi, Ltd
- 当前专利权人: Hitachi, Ltd
- 当前专利权人地址: JP Tokyo
- 主分类号: G10K11/16
- IPC分类号: G10K11/16
摘要:
A noise reduction system for an automotive vehicle powered at least in part by an electric motor located separately from the passenger compartment. The system includes at least one sensor which produces an output signal having a frequency, amplitude and phase representative of noise generated by the electric motor. At least one speaker is positioned closely adjacent the electric motor. A speaker output controller receives the output from the sensor as an input signal and generates an output signal to the speaker so that the speaker produces an audible signal having substantially the same frequency and amplitude but inverted in phase relative to the output from the sensor.
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