公开(公告)号：WO1995007530A1

公开(公告)日：1995-03-16

申请号：PCT/US1994009712

申请日：1994-09-02

Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

Inventor： NOISE CANCELLATION TECHNOLOGIES, INC. ,  HILDEBRAND, Stephen ,  HU, Ziqiang

IPC: G10K11/16

CPC classification number: H01F27/33 ,  G10K11/178 ,  G10K2210/106 ,  G10K2210/1082 ,  G10K2210/119 ,  G10K2210/125 ,  G10K2210/1291 ,  G10K2210/3016 ,  G10K2210/3027 ,  G10K2210/3036 ,  G10K2210/3042 ,  G10K2210/3046 ,  G10K2210/3212 ,  G10K2210/3214 ,  G10K2210/3216 ,  G10K2210/3219 ,  G10K2210/3229 ,  G10K2210/32291 ,  G10K2210/501

Abstract: The present invention relates generally to global noise or sound control and, more particularly, to the control of sound radiated from stationary induction apparatus such as power transformers (1) and shunt reactors by use of active enclosures and active panels (6). The purpose of the invention is to markedly reduce the radiation of sound from the machine to all observation points in the surrounding field with a very lightweight, compact, non-airtight structure (5, 6, 7, 8, 9, 10, 11) which does not impair maintenance or repair of the machine.

Abstract translation: 本发明一般涉及全球噪声或声音控制，更具体地，涉及通过使用有源外壳和有源面板（6）来控制从诸如电力变压器（1）和分流电抗器的固定感应装置辐射的声音。 本发明的目的是以非常轻的，紧凑的非气密结构（5,6,7,8,9,10,11）显着地减少来自机器的声音辐射到周围场中的所有观测点， 这不会损害机器的维护和修理。

公开(公告)号：WO1994027331A1

公开(公告)日：1994-11-24

申请号：PCT/US1994004553

申请日：1994-05-04

Applicant: NOISE CANCELLATION TECHNOLOGIES, INC.

Inventor： NOISE CANCELLATION TECHNOLOGIES, INC. ,  HILDEBRAND, Stephen

IPC: H01L41/08

CPC classification number: H01L41/0973 ,  H01L41/098

Abstract: A low voltage bender piezo-actuator with multiple, same size piezo layers (11, 12) separated by thin electrically conductive strips (14) and adapted to be affixed to a rigid, vibration transmitting plate (10) to produce noise counter vibrations to prevent noise from passing through the plate.

Abstract translation: 一种具有多个相同尺寸的压电层（11,12）的低电压弯曲压电致动器，其由细的导电条（14）分开，并且适于固定到刚性的振动传递板（10）以产生噪声计数器振动以防止 噪音通过盘子。