|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||415/119 ; 60/725 ; 181/206 ; 244/1N|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 30 인용 특허 : 0|
An active liner for attenuating noise includes a rigid backplate supporting a piezoelectric panel. A pressure transducer is disposed in the panel for sensing acoustic pressure of noise being propagated against a face surface of the panel. A controller includes a predetermined schedule of acoustic impedance for controlling a displacement driver joined to the panel to effect a displacement velocity of the panel face surface for obtaining a predetermined acoustic impedance at the sensed acoustic pressure for attenuating noise.
An active liner for attenuating noise comprising: a rigid backplate; a piezoelectric panel having a back surface fixedly joined to said backplate, and an opposite face surface for directly facing said noise; a pressure transducer disposed in said panel for sensing acoustic pressure of said noise being propagated against said panel face surface; means for electrically driving said panel to effect piezoelectric displacement thereof in a direction normal to said panel face surface; and means operatively joined to said pressure transducer and said driving me...