公开(公告)号：US5515444A

公开(公告)日：1996-05-07

申请号：US320153

申请日：1994-10-07

申请人： Ricardo Burdisso ,  Chris R. Fuller ,  Walter F. O'Brien ,  Russell H. Thomas ,  Mary E. Dungan

发明人： Ricardo Burdisso ,  Chris R. Fuller ,  Walter F. O'Brien ,  Russell H. Thomas ,  Mary E. Dungan

IPC分类号： F01N1/00 ,  F02C7/045 ,  G10K11/178 ,  G10K11/16

CPC分类号： G10K11/1786 ,  G10K11/1788 ,  F05B2260/962 ,  G10K2210/107 ,  G10K2210/112 ,  G10K2210/121 ,  G10K2210/1281 ,  G10K2210/1291 ,  G10K2210/3032 ,  G10K2210/3042 ,  G10K2210/3045 ,  G10K2210/3046 ,  G10K2210/3226 ,  G10K2210/32271 ,  G10K2210/3229 ,  G10K2210/32291 ,  G10K2210/511

摘要： An active noise control system using a compact sound source is effective to reduce aircraft engine duct noise. The fan noise from a turbofan engine is controlled using an adaptive filtered-x LMS algorithm. Single multi channel control systems are used to control the fan blade passage frequency (BPF) tone and the BPF tone and the first harmonic of the BPF tone for a plane wave excitation. A multi channel control system is used to control any spinning mode. The multi channel control system to control both fan tones and a high pressure compressor BPF tone simultaneously. In order to make active control of turbofan inlet noise a viable technology, a compact sound source is employed to generate the control field. This control field sound source consists of an array of identical thin, cylindrically curved panels with an inner radius of curvature corresponding to that of the engine inlet. These panels are flush mounted inside the inlet duct and sealed on all edges to prevent leakage around the panel and to minimize the aerodynamic losses created by the addition of the panels. Each panel is driven by one or more piezoelectric force transducers mounted on the surface of the panel. The response of the panel to excitation is maximized when it is driven at its resonance; therefore, the panel is designed such that its fundamental frequency is near the tone to be canceled, typically 2000-4000 Hz.

摘要翻译： 使用紧凑声源的主动噪声控制系统有效地减少飞机发动机管道噪声。 来自涡扇发动机的风扇噪声使用自适应滤波x LMS算法进行控制。 单个多通道控制系统用于控制风扇叶片通过频率（BPF）音调和BPF音调以及用于平面波激励的BPF音调的一次谐波。 多通道控制系统用于控制任何旋转模式。 多通道控制系统同时控制风扇音调和高压压缩机BPF音调。 为了积极控制涡轮风扇入口噪声是一项可行的技术，采用紧凑型声源来产生控制领域。 该控制场声源由相同的薄的圆柱形曲面的阵列组成，其内径曲率对应于发动机入口的曲率半径。 这些面板齐平地安装在入口管道的内部，并密封在所有边缘上，以防止面板周围的泄漏，并最大限度地减少通过添加面板而产生的空气动力学损失。 每个面板由安装在面板表面上的一个或多个压电力传感器驱动。 当它的共振被驱动时，面板对激发的响应最大化; 因此，面板被设计成使得其基本频率接近待消除的音调，通常为2000-4000Hz。

公开(公告)号：US5621656A

公开(公告)日：1997-04-15

申请号：US318630

申请日：1994-10-11

申请人： Andrew J. Langley

发明人： Andrew J. Langley

IPC分类号： G10K11/178 ,  H03B29/00

CPC分类号： G10K11/1784 ,  G10K2210/129 ,  G10K2210/3028 ,  G10K2210/3045 ,  G10K2210/32271 ,  G10K2210/501

摘要： This invention relates to control systems for the control of noise and vibration. Resonators with adjustable properties are used in conjunction with an electronic control system to change the noise or vibration in a structure. The invention relates particularly to the control of quasi-periodic noise or vibration comprising one or more harmonics by using one or more adaptive resonators.

摘要翻译： PCT No.PCT / US92 / 03024 Sec。 371日期：1994年10月11日 102（e）日期1994年10月11日PCT提交1992年4月15日PCT公布。 公开号WO93 / 21687 日期：1993年10月28日本发明涉及用于控制噪声和振动的控制系统。 具有可调特性的谐振器与电子控制系统一起使用，以改变结构中的噪声或振动。 本发明特别涉及通过使用一个或多个自适应谐振器来控制包含一个或多个谐波的准周期性噪声或振动。

公开(公告)号：US5423658A

公开(公告)日：1995-06-13

申请号：US143603

申请日：1993-11-01

申请人： Frederic G. Pla ,  Harindra Rajiyah ,  Anthony A. Renshaw ,  Robert A. Hedeen

发明人： Frederic G. Pla ,  Harindra Rajiyah ,  Anthony A. Renshaw ,  Robert A. Hedeen

IPC分类号： B64C1/40 ,  F02C7/045 ,  G10K11/178 ,  F01D25/00

CPC分类号： G10K11/1788 ,  F02C7/045 ,  F05D2260/962 ,  G10K2210/107 ,  G10K2210/121 ,  G10K2210/1281 ,  G10K2210/32271 ,  G10K2210/32291 ,  G10K2210/511 ,  Y02T50/671

摘要： A noise source for an aircraft engine active noise cancellation system in which the resonant frequency of noise radiating structure is tuned to permit noise cancellation over a wide range of frequencies. The resonant frequency of the noise radiating structure is tuned by a plurality of drivers arranged to contact the noise radiating structure. Excitation of the drivers causes expansion or contraction of the drivers, thereby varying the edge loading applied to the noise radiating structure. The drivers are actuated by a controller which receives input of a feedback signal proportional to displacement of the noise radiating element and a signal corresponding to the blade passage frequency of the engine's fan. In response, the controller determines a control signal which is sent to the drivers, causing them to expand or contract. The noise radiating structure may be either the outer shroud of the engine or a ring mounted flush with an inner wall of the shroud or disposed in the interior of the shroud.

摘要翻译： 用于飞机发动机主动噪声消除系统的噪声源，其中噪声辐射结构的谐振频率被调谐以允许在宽范围的频率上的噪声消除。 噪声辐射结构的谐振频率由布置成接触噪声辐射结构的多个驱动器调谐。 驾驶员的激励导致驾驶员的扩张或收缩，从而改变施加到噪声辐射结构的边缘负载。 驱动器由控制器启动，控制器接收与噪声辐射元件的位移成比例的反馈信号的输入和对应于发动机风扇的叶片通过频率的信号。 作为响应，控制器确定发送到驱动器的控制信号，使其扩展或收缩。 噪声辐射结构可以是发动机的外护罩或安装在护罩的内壁上或设置在护罩内部的环。

公开(公告)号：US09856030B2

公开(公告)日：2018-01-02

申请号：US14554933

申请日：2014-11-26

申请人： ROHR, INC.

发明人： Robert L. Braden ,  Teresa M. Kruckenberg ,  Vijay V. Pujar ,  Hwa-Wan Kwan

IPC分类号： F02C7/045 ,  H04R23/00 ,  B64D29/00 ,  G10K11/178 ,  G10K11/172 ,  H04R1/28 ,  H04R7/12 ,  H04R31/00

CPC分类号： B64D29/00 ,  F02C7/045 ,  F05D2250/283 ,  F05D2260/962 ,  F05D2260/963 ,  G10K11/172 ,  G10K11/178 ,  G10K11/17861 ,  G10K2210/1281 ,  G10K2210/3212 ,  G10K2210/3214 ,  G10K2210/32271 ,  H04R1/2811 ,  H04R7/125 ,  H04R23/002 ,  H04R31/006 ,  H04R2307/023 ,  Y02T50/671

摘要： An acoustic liner may include a core with a plurality of resonator chambers, a perforated top sheet coupled to the core, and a backskin coupled to the core. A thermoacoustic speaker including nanomaterials may be coupled to at least one of the core, the backskin, and the perforated top sheet. A voltage may be applied to the thermoacoustic speaker. The thermoacoustic carbon nanotube speaker may create a dynamic excitation within a resonator chamber in the core. The dynamic excitation may change the liner acoustic impedance to achieve optimum noise attenuation over a wide range of frequencies or engine operating conditions.

公开(公告)号：US20160019879A1

公开(公告)日：2016-01-21

申请号：US14774482

申请日：2014-03-07

申请人： BAE SYSTEMS plc

发明人： Stephen Daley ,  Matthew John Reynolds

IPC分类号： G10K11/172 ,  B23K26/00 ,  B23K26/342

CPC分类号： G10K11/172 ,  B23K26/0006 ,  B23K26/342 ,  B23K2103/14 ,  B33Y10/00 ,  B33Y80/00 ,  G10K11/04 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/32271

摘要： A metamaterial (400) for attenuating acoustic transmission comprises a plurality of layers (410). Each layer (410) comprises a transmission structure (420) and a resonator (450), coupled to the transmission structure (420). The transmission structure (420) in a layer (410) is coupled to the transmission structures (420) of the layers (410) neighbouring said layer (410). The resonator (450) in a layer (410) is coupled to the transmission structure (420) of the layers (410) neighbouring said layer (410).

摘要翻译： 用于衰减声传播的超材料（400）包括多个层（410）。 每个层（410）包括耦合到传输结构（420）的传输结构（420）和谐振器（450）。 层（410）中的传输结构（420）耦合到与所述层（410）相邻的层（410）的传输结构（420）。 层（410）中的谐振器（450）耦合到与所述层（410）相邻的层（410）的传输结构（420）。

公开(公告)号：US07885415B2

公开(公告)日：2011-02-08

申请号：US11213424

申请日：2005-08-26

申请人： Harald Breitbach ,  Christian Gerner ,  Delf Sachau

发明人： Harald Breitbach ,  Christian Gerner ,  Delf Sachau

IPC分类号： H04R29/00

CPC分类号： G10K11/178 ,  G10K2210/1281 ,  G10K2210/32271

摘要： The present application relates to a sound reduction device as well as to a corresponding method. The sound reduction device comprises a sound pickup for measuring an occurring error signal of a primary sound wave of the noise source and of a secondary sound wave of a narrow-band electroacoustic transducer. This error signal may be transmitted to a control unit, which receives a reference signal of the noise source and generates a control signal which is adapted to change the mechanical values of the electroacoustic transducer.

摘要翻译： 本申请涉及减音装置以及相应的方法。 声音降低装置包括用于测量噪声源的主声波和窄带电声换能器的次声波的出现的误差信号的声音拾取器。 该误差信号可以被发送到接收噪声源的参考信号的控制单元，并产生适于改变电声换能器的机械值的控制信号。

公开(公告)号：US06792907B1

公开(公告)日：2004-09-21

申请号：US10378767

申请日：2003-03-04

申请人： John D. Kostun ,  Lakhi N. Goenka ,  David J. Moenssen ,  Christopher E. Shaw

发明人： John D. Kostun ,  Lakhi N. Goenka ,  David J. Moenssen ,  Christopher E. Shaw

IPC分类号： F02M3510

CPC分类号： F01N1/023 ,  F01N1/02 ,  F01N1/065 ,  G10K2210/101 ,  G10K2210/1282 ,  G10K2210/3027 ,  G10K2210/3216 ,  G10K2210/32271 ,  G10K2210/32272

摘要： A continuously variable Helmholtz resonator for a vehicle air intake system having a vibratory input to the resonator wall to dynamically adjust the cancellation frequency for time-varying acoustical signals, and at least one of mean resonator volume control, mean resonator neck length control, and mean resonator neck diameter control whereby control of both the dynamic and the mean properties of the resonator provides a wide-tuning spectrum and facilitates canceling of time-varying acoustical signals.

摘要翻译： 一种用于车辆进气系统的连续可变的亥姆霍兹共振器，其具有到谐振器壁的振动输入以动态地调节用于时变声学信号的抵消频率，以及平均谐振器体积控制，平均谐振器颈部长度控制和平均值 谐振器颈部直径控制，由此谐振器的动态特性和平均特性的控制提供了宽调谐频谱并且有助于消除时变声学信号。

公开(公告)号：US20040173175A1

公开(公告)日：2004-09-09

申请号：US10378767

申请日：2003-03-04

发明人： John D. Kostun ,  Lakhi N. Goenka ,  David J. Moenssen ,  Christopher E. Shaw

IPC分类号： F02M035/10

CPC分类号： F01N1/023 ,  F01N1/02 ,  F01N1/065 ,  G10K2210/101 ,  G10K2210/1282 ,  G10K2210/3027 ,  G10K2210/3216 ,  G10K2210/32271 ,  G10K2210/32272

摘要： A continuously variable Helmholtz resonator for a vehicle air intake system having a vibratory input to the resonator wall to dynamically adjust the cancellation frequency for time-varying acoustical signals, and at least one of mean resonator volume control, mean resonator neck length control, and mean resonator neck diameter control whereby control of both the dynamic and the mean properties of the resonator provides a wide tuning spectrum and facilitates canceling of time-varying acoustical signals.

摘要翻译： 一种用于车辆进气系统的连续可变的亥姆霍兹共振器，其具有到谐振器壁的振动输入以动态地调节用于时变声学信号的抵消频率，以及平均谐振器体积控制，平均谐振器颈部长度控制和平均值 谐振器颈部直径控制，由此对谐振器的动态特性和平均特性的控制提供宽的调谐频谱并且有助于消除时变声学信号。

公开(公告)号：US06385321B1

公开(公告)日：2002-05-07

申请号：US09180899

申请日：1999-09-02

申请人： Jan Krueger ,  Philip Leistner ,  Helmut Fuchs ,  Roland Lippold

发明人： Jan Krueger ,  Philip Leistner ,  Helmut Fuchs ,  Roland Lippold

IPC分类号： A06F1106

CPC分类号： G10K11/178 ,  G10K2210/112 ,  G10K2210/3026 ,  G10K2210/3217 ,  G10K2210/32271

摘要： A reactive sound attenuator which includes a sensor for detecting a sound parameter in a space, e.g. a duct, consists of a signal amplifier that is used to amplify a detected signal, an electroacoustic transducer and a cavity with at least one membrane. The membrane, which is capable of moving in a vibratory manner, is part of a wall of a space, e.g. a duct wall. A sensor, which is disposed in the immediate vicinity of, in or on the membrane, detects the vibrations of the membrane. The sensor's signal, which is amplified and inverted by the amplifier, controls the membrane vibration via the electroacoustic transducer.

摘要翻译： 一种反应式声音衰减器，其包括用于检测空间中的声音参数的传感器，例如， 导管由用于放大检测信号的信号放大器，电声换能器和具有至少一个膜的空腔组成。 能够以振动方式移动的膜是空间的壁的一部分，例如， 管壁。 设置在膜附近或附近的传感器检测膜的振动。 由放大器放大和反相的传感器信号通过电声换能器控制膜振动。

公开(公告)号：US20160293154A1

公开(公告)日：2016-10-06

申请号：US15022456

申请日：2014-09-19

申请人： THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

发明人： Zhiyu YANG ,  Ping SHENG ,  Min YANG ,  Suet To TANG ,  Guancong MA ,  Songwen XIAO

IPC分类号： G10K11/172 ,  G10K11/178

CPC分类号： G10K11/172 ,  G10K11/178 ,  G10K2210/3212 ,  G10K2210/32271

摘要： Sound attenuation is performed using a sound attenuation panel using an electromagnetic or electrostatic response unit to modify resonance. The sound attenuation panel has an acoustically transparent planar, rigid frame divided into a plurality of individual cells configured for attenuating sound. In one configuration, each cell has a weight fixed to the membrane. The planar geometry of each said individual cell, the flexibility of the membrane, and the weight establish a base resonant frequency for sound attenuation. The electromagnetic or electrostatic response unit is configured to modify the resonant frequency of the cell.

摘要翻译： 使用声音衰减面板使用电磁或静电响应单元来进行声音衰减，以改变共振。 声音衰减面板具有被分成被配置为衰减声音的多个单独单元的声学透明平面刚性框架。 在一个配置中，每个单元具有固定在膜上的重量。 每个所述单个电池的平面几何形状，膜的柔性和重量建立了用于声音衰减的基本共振频率。 电磁或静电响应单元被配置为修改电池的谐振频率。