公开(公告)号：US09881601B2

公开(公告)日：2018-01-30

申请号：US13915220

申请日：2013-06-11

申请人： Bose Corporation

发明人： Christopher A. Barnes ,  Ricardo F. Carreras ,  Daniel M. Gauger, Jr.

IPC分类号： G10K11/178 ,  H04R1/10

CPC分类号： G10K11/178 ,  G10K11/17833 ,  G10K11/1787 ,  G10K2210/3039 ,  G10K2210/3056 ,  H04R1/1083 ,  H04R2460/01

摘要： Stability is provided in an active noise reduction (ANR) headphone by measuring a sound field to generate an input signal, filtering and applying a variable gain to the input signal to produce a first filtered signal using a first filter and a variable gain amplifier in an ANR signal pathway, outputting the filtered signal, and simultaneously with outputting the first filtered signal, sampling a signal at a point in the ANR signal pathway and filtering the sampled signal using a second filter to produce a second filtered signal. The second filtered signal is compared to a threshold, and if the comparison finds that the second filtered signal is greater than the threshold signal, the gain of the variable gain amplifier is changed to attenuate the first filtered signal. The second filter applies different gains, different by at least 10 dB, in different frequency ranges between 10 Hz and 10 kHz.

公开(公告)号：US20170053638A1

公开(公告)日：2017-02-23

申请号：US14832585

申请日：2015-08-21

申请人： Cirrus Logic International Semiconductor Ltd.

发明人： Dayong Zhou ,  Yang Lu ,  Ning Li ,  Nitin Kwatra ,  Antonio J. Miller

IPC分类号： G10K11/178

CPC分类号： G10K11/178 ,  G10K11/16 ,  G10K11/17817 ,  G10K11/17879 ,  G10K11/17885 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/1082 ,  G10K2210/3017 ,  G10K2210/3022 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3035 ,  G10K2210/3039 ,  G10K2210/3045 ,  G10K2210/3049 ,  G10K2210/3053 ,  G10K2210/3055 ,  G10K2210/3056 ,  G10K2210/509 ,  H04R1/1083 ,  H04R3/002 ,  H04R3/005 ,  H04R2410/05 ,  H04R2460/01 ,  H04R2499/11

摘要： In accordance with systems and methods of the present disclosure, an adaptive noise cancellation system may include an alignment filter configured to correct misalignment of a reference microphone signal and an error microphone signal by generating a misalignment correction signal.

摘要翻译： 根据本公开的系统和方法，自适应噪声消除系统可以包括对准滤波器，其被配置为通过产生未对准校正信号来校正参考麦克风信号和误差麦克风信号的未对准。

公开(公告)号：US09294837B2

公开(公告)日：2016-03-22

申请号：US14220253

申请日：2014-03-20

申请人： HONDA MOTOR CO., LTD.

发明人： Kosuke Sakamoto ,  Toshio Inoue ,  Satoru Kikuchi ,  Takanori Yamamoto

IPC分类号： G10K11/16 ,  H04R3/00 ,  G10K11/178

CPC分类号： H04R3/002 ,  G10K11/17827 ,  G10K11/1783 ,  G10K11/17883 ,  G10K11/17885 ,  G10K2210/12821 ,  G10K2210/3014 ,  G10K2210/3039 ,  G10K2210/3056

摘要： A vehicular active vibrational noise control apparatus includes an amplitude limiter for limiting the amplitude of a canceling signal based on a signal level of an audio signal, and a vehicle speed detector for detecting the vehicle speed of a vehicle, which incorporates therein the vehicular active vibrational noise control apparatus. The amplitude limiter changes an amplitude limitation rule, which represents a relationship of a limiting value for the amplitude of the canceling signal to the signal level, depending on the vehicle speed, and limits the amplitude of the canceling signal based on the limiting value determined according to the amplitude limitation rule.

摘要翻译： 车辆有源振动噪声控制装置包括：限幅器，用于根据音频信号的信号电平来限制消除信号的振幅;以及车速检测器，用于检测车辆的车速，其中车辆的主动振动 噪声控制装置。 幅度限制器根据车速改变幅值限制规则，其表示取消信号的振幅的极限值与信号电平的关系，并且基于根据车速确定的限制值来限制抵消信号的幅度 到幅度限制规则。

公开(公告)号：US09294836B2

公开(公告)日：2016-03-22

申请号：US13952221

申请日：2013-07-26

申请人： Cirrus Logic, Inc.

发明人： Dayong Zhou ,  Yang Lu ,  Ning Li

IPC分类号： G10K11/16 ,  H04R3/00 ,  G10K11/178

CPC分类号： H04R3/002 ,  G10K11/16 ,  G10K11/178 ,  G10K11/17817 ,  G10K11/17833 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/3017 ,  G10K2210/3022 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3035 ,  G10K2210/3039 ,  G10K2210/3055 ,  G10K2210/3056 ,  G10K2210/503 ,  G10K2210/509

摘要： In accordance with methods and systems of the present disclosure, a processing circuit may implement at least one of: a feedback filter having a response that generates at least a portion of an anti-noise component from a playback corrected error, the playback corrected error based on a difference between the error microphone signal and a secondary path estimate; and a feedforward filter having a response that generates at least a portion of the anti-noise signal from a reference microphone signal. The processing circuit may also implement a secondary path estimate filter configured to model an electro-acoustic path of a source audio signal and have a response that generates a secondary path estimate from the source audio signal and a secondary path estimate performance monitor for monitoring performance of the secondary path estimate filter in modeling the electro-acoustic path.

摘要翻译： 根据本公开的方法和系统，处理电路可以实现以下至少一个：具有响应的反馈滤波器，该响应从回放校正误差产生抗噪声分量的至少一部分，基于回放校正误差 在误差麦克风信号和次路径估计之间的差异; 以及前馈滤波器，其具有从参考麦克风信号产生抗噪声信号的至少一部分的响应。 处理电路还可以实现二次路径估计滤波器，其被配置为对源音频信号的电声路径进行建模，并且具有从源音频信号生成次路径估计的响应，以及用于监视源音频信号的次级路径估计性能监视器 二次路径估计滤波器对电声路径进行建模。

公开(公告)号：US20150356965A1

公开(公告)日：2015-12-10

申请号：US14762482

申请日：2014-01-21

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： MITSUHIRO TANI ,  MITSURU KAITOU ,  TOSHIYUKI FUNAYAMA

IPC分类号： G10K11/175

CPC分类号： G10K11/175 ,  G10K11/178 ,  G10K11/17823 ,  G10K11/17835 ,  G10K2210/1282 ,  G10K2210/3016 ,  G10K2210/3039

摘要： In an active noise reduction device, in order to solve this problem, a control block determines a level of a reference signal detected by a level detection unit. If determining that the level of the reference signal is small, the control block decreases a level of a cancel signal. This operation suppresses generation of an abnormal sound even if a level of a noise is small.

摘要翻译： 在有源降噪装置中，为了解决这个问题，控制块确定由电平检测单元检测到的参考信号的电平。 如果确定参考信号的电平小，则控制块降低取消信号的电平。 即使噪音小，也能够抑制异常声音的产生。

公开(公告)号：US08848936B2

公开(公告)日：2014-09-30

申请号：US13249687

申请日：2011-09-30

申请人： Nitin Kwatra ,  Jon D. Hendrix

发明人： Nitin Kwatra ,  Jon D. Hendrix

IPC分类号： G10K11/16 ,  G10K11/178

CPC分类号： G10K11/178 ,  G10K11/17833 ,  G10K2210/3017 ,  G10K2210/3037 ,  G10K2210/3039 ,  G10K2210/3045 ,  G10K2210/3213 ,  G10K2210/503

摘要： A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. A processing circuit monitors a level of the anti-noise signal, determines that the anti-noise signal may cause damage to the transducer and adjusts the generation of the anti-noise signal such that damage to the transducer is prevented.

摘要翻译： 诸如无线电话的个人音频设备包括噪声消除电路，其自适应地从参考麦克风信号产生抗噪声信号，并将抗噪声信号注入到扬声器或其它换能器输出中以引起环境音频声音的消除。 处理电路监视抗噪声信号的电平，确定抗噪声信号可能导致对换能器的损坏并调整抗噪声信号的产生，从而防止对换能器的损坏。

公开(公告)号：US07317801B1

公开(公告)日：2008-01-08

申请号：US09120973

申请日：1998-07-22

申请人： Nehemia Amir

发明人： Nehemia Amir

IPC分类号： A61F11/06 ,  G10K11/16 ,  H03B29/00 ,  H04B15/00

CPC分类号： G10K11/178 ,  G10K2210/12 ,  G10K2210/3039 ,  G10K2210/505

摘要： An active acoustic noise reduction system which comprises a single input transducer and an output actuator that are physically located next to each other in the same location. In one embodiment, the input transducer and the output actuator are a hybrid represented by a single element. The active noise reduction system is located as close as possible to the noise source and functions to generate an antinoise cancellation sound wave with minimum delay and opposite phase with respect to the noise source. The noise reduction system also comprises a non linearity correction circuit, a delayed cancellation circuit and variable gain amplifier. The system provides user control of the quiet zones generated by the system by varying the gain of the variable gain amplifier. The system provides a user with the ability In one embodiment, an echo canceler is utilized to remove echoes fed back from the output actuator. In another embodiment, an input decoder is used instead of an echo canceler to remove feedback picked up from the output actuator.

摘要翻译： 一种主动声学噪声降低系统，其包括物理上位于相同位置处彼此相邻的单个输入传感器和输出致动器。 在一个实施例中，输入传感器和输出致动器是由单个元件表示的混合。 有源噪声降低系统尽可能靠近噪声源并且用于产生相对于噪声源具有最小延迟和相反相位的抗噪声消除声波。 降噪系统还包括非线性校正电路，延迟消除电路和可变增益放大器。 该系统通过改变可变增益放大器的增益来提供系统产生的安静区域的用户控制。 系统为用户提供了能力。在一个实施例中，使用回波消除器来去除从输出致动器反馈的回波。 在另一个实施例中，使用输入解码器代替回波消除器以去除从输出致动器拾取的反馈。

公开(公告)号：US20030095670A1

公开(公告)日：2003-05-22

申请号：US10201540

申请日：2002-07-22

发明人： Michael Jon Wurtz

IPC分类号： A61F011/06 ,  G10K011/16 ,  H03B029/00

CPC分类号： G10K11/178 ,  A61F2011/145 ,  G10K2210/101 ,  G10K2210/1081 ,  G10K2210/3016 ,  G10K2210/3028 ,  G10K2210/3039 ,  G10K2210/3213 ,  G10K2210/3214 ,  G10K2210/3219 ,  G10K2210/503 ,  H04R1/1083 ,  H04R2460/01

摘要： Active-noise-reduction (ANR) headsets protect the hearing of their users from loud persistent noises, such as airplane engines and construction equipment. These headsets generally include ear speakers and special circuitry to cancel or suppress certain types of loud persistent noises. One problem the present inventor recognized with active headsets, particularly those manufactured in mass quantities, concerns the performance variations that stem from inevitable variations in the fit of their earcups against heads of their users. For example, in putting on and taking off these headsets, some users experience low-pitched noises. Accordingly, the inventor devised, among other things, headsets that include front-cavity vents for equalizing the pressure between a front cavity portion of an earcup and an ambient environment.

摘要翻译： 主动降噪（ANR）耳机保护用户的听力免受诸如飞机发动机和施工设备等大量持续的噪音。 这些耳机通常包括耳机扬声器和特殊电路来取消或抑制某些类型的大声持续噪声。 本发明人用主动耳机，特别是批量生产的发明人所认识到的一个问题在于，其耳塞的适应性不可避免地与用户头部的变化有关。 例如，在戴上这些耳机时，有些用户会感到低调的噪音。 因此，发明人设计了包括用于均衡耳罩的前腔部分和周围环境之间的压力的前腔通气口的耳机。

公开(公告)号：US20010046301A1

公开(公告)日：2001-11-29

申请号：US09864775

申请日：2001-05-24

申请人： Matsushita Electric Industrial Co., Ltd.

发明人： Yoshio Nakamura ,  Toshihiko Ohashi ,  Kenichi Terai ,  Hiroyuki Hashimoto ,  Isao Kakuhari ,  Hisashi Sano ,  Toshio Inoue ,  Akira Takahashi ,  Tsuyoshi Yamashita

IPC分类号： H03B029/00

CPC分类号： G10K11/178 ,  G10K2210/12821 ,  G10K2210/3039

摘要： An active noise control system for reducing road noise of low frequency generated inside the cabin of a vehicle is provided. The active noise control system includes a noise detector, a signal generator for,processing the input noise signal to generate a signal for producing noise canceling waves, a limiting amplifier having a specified threshold value for variably amplifying the processed signal so that the amplitude of output signal will not exceed the threshold value, and an electrical acoustic converter for producing noise canceling acoustic waves in accordance with the output signal.

摘要翻译： 提供了一种用于减少车​​辆舱内产生的低频道路噪声的主动噪声控制系统。 有源噪声控制系统包括噪声检测器，用于处理输入噪声信号以产生产生噪声消除波的信号的信号发生器，具有指定阈值的限幅放大器，用于可变地放大经处理的信号，使得输出幅度 信号不超过阈值，以及用于根据输出信号产生噪声消除声波的电声转换器。

公开(公告)号：US20010036279A1

公开(公告)日：2001-11-01

申请号：US09792956

申请日：2001-02-26

发明人： Paul D. Daly

IPC分类号： H03B029/00

CPC分类号： F02M35/125 ,  G10K11/178 ,  G10K2210/121 ,  G10K2210/3031 ,  G10K2210/3039

摘要： The air induction system comprises an air intake and speaker disposed about the air intake. A control unit is in communication with the speaker. At least one receiver permits communication between the control unit and at least one powertrain input. An engine computer may communicate the powertrain input to the receiver and prevent such communication at a predetermined threshold based on engine load.

摘要翻译： 空气感应系统包括围绕进气口设置的进气口和扬声器。 控制单元与扬声器通信。 至少一个接收器允许控制单元与至少一个动力系输入之间的通信。 发动机计算机可以将动力系输入传送到接收机，并基于发动机负载防止在预定阈值的这种通信。