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公开(公告)号：EP0712114A2
公开(公告)日：1996-05-15
申请号：EP95307857.3
申请日：1995-11-03
IPC分类号： G10K11/178 , B06B1/06
CPC分类号： F02C7/045 , F05D2220/327 , F05D2260/962 , G10K11/178 , G10K2210/121 , G10K2210/1281 , G10K2210/3032 , G10K2210/3217 , G10K2210/32271 , G10K2210/32291 , Y02T50/671
摘要： An active liner for attenuating noise includes a rigid backplate (26) supporting a piezoelectric panel (28). A pressure transducer (30) is disposed in the panel (28) for sensing acoustic pressure of noise being propagated against a face surface of the panel. A controller (36) includes a predetermined schedule of acoustic impedance for controlling a displacement driver (32) joined to the panel (28) to effect a displacement velocity of the panel face surface (28b) for obtaining a predetermined acoustic impedance at the sensed acoustic pressure for attenuating noise.
摘要翻译： 活性衬里包括刚性背板，压电板具有固定地连接到背板的后表面，以及用于直接面对噪声的相对表面。 压力传感器设置在面板中，用于感测抵靠面板表面传播的噪声的声压。 电子设备电驱动面板以在垂直于面板表面的方向上实现其压电位移。 装置可操作地连接到压力传感器和驱动装置，用于控制面板表面的位移。 控制装置包括预定的声阻抗调度表，用于控制驱动装置，以实现用于声压的面板表面的速度，以获得预定的声阻抗以衰减噪声。
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公开(公告)号：EP0712114B1
公开(公告)日：2002-10-09
申请号：EP95307857.3
申请日：1995-11-03
IPC分类号： G10K11/178 , B06B1/06 , G10K11/20
CPC分类号： F02C7/045 , F05D2220/327 , F05D2260/962 , G10K11/178 , G10K2210/121 , G10K2210/1281 , G10K2210/3032 , G10K2210/3217 , G10K2210/32271 , G10K2210/32291 , Y02T50/671
摘要： The active liner comprises the rigid backplate, the piezoelectric panel having a back surface fixedly joined to the backplate, and an opposite face surface for directly facing the noise. The pressure transducer is disposed in the panel for sensing acoustic pressure of the noise being propagated against the panel face surface. A device electrically drives the panel to effect piezoelectric displacement of it in a direction normal to the panel face surface. A device is operatively joined to the pressure transducer and the driving device for controlling displacement of the panel face surface. The control device includes a predetermined schedule of acoustic impedance for controlling the driving device to effect a velocity of the panel face surface for the acoustic pressure for obtaining the predetermined acoustic impedance to attenuate the noise.
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公开(公告)号：EP0712114A3
公开(公告)日：1998-01-07
申请号：EP95307857.3
申请日：1995-11-03
IPC分类号： G10K11/178 , B06B1/06
CPC分类号： F02C7/045 , F05D2220/327 , F05D2260/962 , G10K11/178 , G10K2210/121 , G10K2210/1281 , G10K2210/3032 , G10K2210/3217 , G10K2210/32271 , G10K2210/32291 , Y02T50/671
摘要： An active liner for attenuating noise includes a rigid backplate (26) supporting a piezoelectric panel (28). A pressure transducer (30) is disposed in the panel (28) for sensing acoustic pressure of noise being propagated against a face surface of the panel. A controller (36) includes a predetermined schedule of acoustic impedance for controlling a displacement driver (32) joined to the panel (28) to effect a displacement velocity of the panel face surface (28b) for obtaining a predetermined acoustic impedance at the sensed acoustic pressure for attenuating noise.
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