公开(公告)号：US20170103746A1

公开(公告)日：2017-04-13

申请号：US15383839

申请日：2016-12-19

申请人： Cirrus Logic International Semiconductor Ltd.

发明人： Richard Clemow

IPC分类号： G10K11/178 ,  H04R1/10

CPC分类号： G10K11/178 ,  G10K11/16 ,  G10K2210/1081 ,  G10K2210/3051 ,  G10K2210/3217 ,  H04R1/1083 ,  H04R3/02

摘要： A digital circuit arrangement for an ambient noise-reduction system affording a higher degree of noise reduction than has hitherto been possible. The arrangement converts the analog signals into N-bit digital signals at sample rate f0, and then subjects the converted signals to digital filtering. The value of N in some embodiments is 1 but, in any event, is no greater than 8, and f0 may be 64 times the Nyquist sampling rate but, in any event, is substantially greater than the Nyquist sampling rate. This permits digital processing to be used without incurring group delay problems that rule out the use of conventional digital processing in this context. Furthermore, adjustment of the group delay can readily be achieved, in units of a fraction of a micro-second, providing the ability to fine tune the group delay for feed forward applications.

公开(公告)号：US09558729B2

公开(公告)日：2017-01-31

申请号：US14142329

申请日：2013-12-27

申请人： Wolfson Microelectronics plc

发明人： Richard Clemow

IPC分类号： G10K11/16 ,  H04R3/02 ,  H04R1/10 ,  G10K11/178

CPC分类号： G10K11/178 ,  G10K11/16 ,  G10K2210/1081 ,  G10K2210/3051 ,  G10K2210/3217 ,  H04R1/1083 ,  H04R3/02

摘要： A digital circuit arrangement for an ambient noise-reduction system affording a higher degree of noise reduction than has hitherto been possible. The arrangement converts the analog signals into N-bit digital signals at sample rate f0, and then subjects the converted signals to digital filtering. The value of N in some embodiments is 1 but, in any event, is no greater than 8, and f0 may be 64 times the Nyquist sampling rate but, in any event, is substantially greater than the Nyquist sampling rate. This permits digital processing to be used without incurring group delay problems that rule out the use of conventional digital processing in this context. Furthermore, adjustment of the group delay can readily be achieved, in units of a fraction of a micro-second, providing the ability to fine tune the group delay for feed forward applications.

摘要翻译： 用于环境降噪系统的数字电路装置提供比迄今为止可能更高程度的噪声降低的数字电路装置。 该装置将模拟信号以采样率f0转换为N位数字信号，然后将转换的信号转换为数字滤波。 在一些实施例中，N的值为1但是在任何情况下都不大于8，并且f0可以是奈奎斯特采样率的64倍，但是在任何情况下都大大地高于奈奎斯特采样率。 这允许使用数字处理，而不会导致在这种情况下排除使用常规数字处理的组延迟问题。 此外，可以容易地实现组延迟的调整，以微秒的一小部分为单位，提供微调前馈应用的组延迟的能力。

公开(公告)号：US20090046867A1

公开(公告)日：2009-02-19

申请号：US12295709

申请日：2007-04-11

申请人： Richard Clemow

发明人： Richard Clemow

IPC分类号： G10K11/16

CPC分类号： G10K11/178 ,  G10K11/16 ,  G10K2210/1081 ,  G10K2210/3051 ,  G10K2210/3217 ,  H04R1/1083 ,  H04R3/02

摘要： The invention provides a digital circuit arrangement for an ambient noise-reduction system affording a higher degree of noise reduction than has hitherto been possible, through the use of a low latency signal processing chain consisting of analogue-to-digital conversion, digital processing and digital-to-analogue conversion. The arrangement converts the analogue signals into N-bit digital signals at sample rate f0, and then subjects the converted signals to digital filtering. The value of N in some embodiments is 1 but, in any event, is no greater than 8, and f0 may be 64 times the Nyquist sampling rate but, in any event, is substantially greater than the Nyquist sampling rate. This permits digital processing to be used without incurring group delay problems that rule out the use of conventional digital processing in this context. Furthermore, adjustment of the group delay can readily be achieved, in units of a fraction of a micro-second, providing the ability to fine tune the group delay for feed-forward applications.

摘要翻译： 本发明提供了一种用于环境降噪系统的数字电路装置，其通过使用由模数转换，数字处理和数字化的低等待时间信号处理链提供比迄今为止可能更高程度的噪声降低 模拟转换。 该装置将模拟信号转换成采样率f0的N位数字信号，然后将转换的信号转换为数字滤波。 在一些实施例中，N的值为1但是在任何情况下都不大于8，并且f0可以是奈奎斯特采样率的64倍，但是在任何情况下都大大地大于奈奎斯特采样率。 这允许使用数字处理，而不会导致在这种情况下排除使用常规数字处理的组延迟问题。 此外，可以以微秒的一小部分为单位容易地实现组延迟的调整，从而提供对前馈应用的组延迟进行微调的能力。

公开(公告)号：US20070036367A1

公开(公告)日：2007-02-15

申请号：US11541660

申请日：2006-10-03

申请人： Byeong-seob Ko

发明人： Byeong-seob Ko

IPC分类号： A61F11/06 ,  G10K11/16 ,  H03B29/00

CPC分类号： G10K11/178 ,  G10K2210/1081 ,  G10K2210/3217

摘要： An apparatus and method of reducing noise in a portable audio reproducing apparatus using earphones. The apparatus includes an earphone unit having a speaker unit and a microphone to output an audio signal and to generate anti-noise with respect to external noise, and a circuit unit to compensate a frequency characteristic of the anti-noise generated by the microphone of the earphone unit, to add the anti-noise to an input audio signal, and to remove background noise using the anti-noise by outputting the audio signal having the anti-noise to the speaker unit.

摘要翻译： 使用耳机的便携式音频再现装置中的噪声降低的装置和方法。 该装置包括具有扬声器单元和麦克风的耳机单元，用于输出音频信号并产生相对于外部噪声的抗噪声;以及电路单元，用于补偿由麦克风产生的抗噪声的频率特性 耳机单元，以将抗噪声添加到输入音频信号，并且通过将具有抗噪声的音频信号输出到扬声器单元，使用抗噪声去除背景噪声。

公开(公告)号：US06898289B2

公开(公告)日：2005-05-24

申请号：US10071531

申请日：2002-02-07

申请人： James K. Vanderveen ,  Zhouxuan Xia

发明人： James K. Vanderveen ,  Zhouxuan Xia

IPC分类号： B60K13/02 ,  F02M35/12 ,  G10K11/178 ,  G10K11/16 ,  H04B1/00

CPC分类号： B60K13/02 ,  F02M35/125 ,  G10K11/178 ,  G10K2210/107 ,  G10K2210/121 ,  G10K2210/1282 ,  G10K2210/3031 ,  G10K2210/3214 ,  G10K2210/3217 ,  G10K2210/3229

摘要： An active noise attenuation system (10) comprises a speaker (26) in communication with a flow body (78). The speaker (26) emits an output for attenuating noise from the flow body (78). A control unit (31) communicates with the speaker (26) and controls the output. A housing (14) has one volume (18) acting as a liquid storage chamber and another volume (22) acting as a speaker chamber.

摘要翻译： 有源噪声衰减系统（10）包括与流体（78）连通的扬声器（26）。 扬声器（26）发射用于衰减来自流体（78）的噪声的输出。 控制单元（31）与扬声器（26）通信并控制输出。 壳体（14）具有用作液体储存室的一个体积（18）和用作扬声器室的另一容积（22）。

公开(公告)号：US06711267B1

公开(公告)日：2004-03-23

申请号：US09308442

申请日：1999-05-19

申请人： Kari Kirjavainen

发明人： Kari Kirjavainen

IPC分类号： A61F1106

CPC分类号： G10K11/178 ,  A61F2011/145 ,  G10K2210/108 ,  G10K2210/3026 ,  G10K2210/3217

摘要： The invention relates to a method and an apparatus for sound processing, where sound is attenuated by measuring it and by producing with an actuator a sound field of opposite sign in view of the original sound field. A desired value signal (I) is supplied to the actuator which reproduces the signal. To the actuator is attached a sensor, measuring sound pressure, and the difference of the sensor signal (B) and the desired value signal (I) is applied as high gain feedback to the actuator. As a consequence, sound not pertaining to the desired value signal (I) can be attenuated in a simple manner, and sound in accordance with the desired value signal (I) can be produced simultaneously with the same apparatus.

摘要翻译： 本发明涉及一种用于声音处理的方法和装置，其中通过测量声音来衰减声音，并且通过利用致动器产生与原始声场相反的声场的声场。 将期望的值信号（I）提供给再现信号的致动器。 执行器附加传感器，测量声压，传感器信号（B）和期望值信号（I）的差异作为高增益反馈应用于执行机构。 结果，可以以简单的方式衰减与期望值信号（I）不相关的声音，并且可以与相同的装置同时产生符合期望值信号（I）的声音。

公开(公告)号：US20030086573A1

公开(公告)日：2003-05-08

申请号：US10261891

申请日：2002-09-30

发明人： Daniel Willem Elisabeth Schobben ,  Ronaldus Maria Aarts

IPC分类号： H04R003/02 ,  H04R001/10

CPC分类号： G10K11/178 ,  G10K2210/101 ,  G10K2210/1081 ,  G10K2210/3026 ,  G10K2210/3028 ,  G10K2210/3055 ,  G10K2210/3217

摘要： In a method for reproducing sound signals by means of headphones provided with microphones, unwanted sound signals from at least one external sound source are compensated by sound signals, simulating in anti-phase the sound signals from said at least one external sound source. The anti-phase sound signals being generated in the headphones in response to signals derived from audio input signals of the at least one external sound source in a first filter device which is controlled by the resulting microphone signals. Further, wanted sound signals are generated in the headphones in response to signals derived from further audio input signals in a second filter device with transfer functions substantially equal to the corresponding transfer functions of the first filter device.

摘要翻译： 在通过设置有麦克风的耳机再现声音信号的方法中，来自至少一个外部声源的不需要的声音信号被声音信号补偿，所述声音信号模拟来自所述至少一个外部声源的声音信号的反相。 响应于由所产生的麦克风信号控制的第一滤波器装置中的至少一个外部声源的音频输入信号导出的信号，在耳机中产生反相声音信号。 此外，响应于在第二滤波器装置中从其他音频输入信号导出的信号，在耳机中产生所需声音信号，其传递函数基本上等于第一滤波器装置的相应传递函数。

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：US5822439A

公开(公告)日：1998-10-13

申请号：US562496

申请日：1995-11-24

申请人： Kazuhiro Sakiyama ,  Kazuya Sako ,  Masaaki Nagami ,  Masahiro Babasaki

发明人： Kazuhiro Sakiyama ,  Kazuya Sako ,  Masaaki Nagami ,  Masahiro Babasaki

IPC分类号： B60R19/48 ,  F01N1/06 ,  F16L55/033 ,  A61F11/06

CPC分类号： F16L55/0333 ,  B60R19/48 ,  F01N1/065 ,  G10K2210/1053 ,  G10K2210/12822 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3045 ,  G10K2210/3214 ,  G10K2210/3217 ,  G10K2210/3219 ,  G10K2210/3227

摘要： A noise control device disposed at the outlet of a tail pipe which emits exhaust noise of an automobile to silence noise from the tail pipe comprises a speaker which is arranged near the tail pipe and of which the open surface has a constant angle with respect to a vertical plane, an enclosure which closes the rear portion of the speaker, and a silencing sound guide portion which guides silencing sounds emitted from the front surface of the speaker to the outlet of the tail pipe. A closed space into which a bumper for absorbing impact in case of collision is made, is used as a resonant-cavity of said speaker. Based on the amount of silencing noise which becomes greater as a plurality of microphones are arranged to be closer to the speaker, the outputs of the plurality of microphones apart a constant distance from said speaker are synthesized.

摘要翻译： 设置在尾管出口处的噪声控制装置，其排放汽车的排气噪声，以使来自尾管的噪声静音，包括布置在尾管附近的扬声器，其开口表面相对于 关闭扬声器的后部的外壳，以及将从扬声器的前表面发出的消音声音引导到尾管的出口的消声导引部。 作为在碰撞时吸收冲击的保险杠的封闭空间用作所述扬声器的谐振腔。 基于随着多个麦克风更靠近扬声器而变得更大的消音噪声的量，合成了距离扬声器一定距离的多个麦克风的输出。

公开(公告)号：US5524058A

公开(公告)日：1996-06-04

申请号：US180346

申请日：1994-01-12

申请人： William T. Moseley

发明人： William T. Moseley

IPC分类号： A42B3/30 ,  A61F11/14 ,  G10K11/178 ,  H04M1/19 ,  G10K11/16

CPC分类号： H04M1/19 ,  A42B3/30 ,  G10K11/1788 ,  A61F2011/145 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/125 ,  G10K2210/3217 ,  G10K2210/3229 ,  G10K2210/509

摘要： A noise cancellation module is combined with a telephone handset or article of headwear to cancel a selected frequency or range of frequencies so as to enable a user to better use the handset and function with the headwear in place.

摘要翻译： 噪声消除模块与电话听筒或头饰物品组合以取消所选择的频率或频率范围，以使得用户能够更好地使用手机并且使头盔在适当位置起作用。