发明授权
- 专利标题： Active noise control apparatus
- 专利标题（中）： 主动噪声控制装置
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申请号： US08932176申请日： 1997-09-17
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公开(公告)号： US06192133B1公开(公告)日： 2001-02-20
- 发明人: Akihiko Enamito , Takuro Hayashi
- 申请人： Akihiko Enamito , Takuro Hayashi
- 优先权： JP8-245296 19960917
- 主分类号： A61F1106
- IPC分类号： A61F1106
摘要：
A speaker, serving as an additional sound source, is provided close to a noise source, two microphones are arranged on a central axis of a vibration surface of the speaker to be spaced from each other, acoustic intensity of the speaker is measured from outputs of these microphones, and an input to the speaker is controlled by a controller such that acoustic intensity, that is, acoustic power of the speaker is set to be zero or minimized.