| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 1 | 在具有适应性噪音消除（ANC）的个人语音设备中的带限抗噪音 | CN201280027248.6 | 2012-05-24 | CN103597541B | 2017-05-31 | N·卡瓦特拉; 阿里·阿卜杜拉扎德米拉尼; 杰弗里·奥尔德森 |
| 一种个人语音设备，例如无线电话，包括噪音消除电路，其适应性地从参考麦克风信号产生抗噪音信号，并且将该抗噪音信号注入到扬声器或其他传感器输出以导致周围音频声音的消除。误差麦克风提供在扬声器附近以测量传感器的输出以便控制抗噪音信号的调适和以估计从噪音消除电路穿过传感器的电声音路径。适应性地产生抗噪音信号来使在误差麦克风处的周围音频声音最小化。执行适应性噪音消除(ANC)功能的处理电路还过滤参考麦克风信号和/或误差麦克风信号的一个或两者，以偏置适应性滤波器在一个或多个频率区域中的调适，以改变在误差麦克风处的周围音频声音的最小化程度。 | ||||||
| 2 | 在具有适应性噪音消除（ANC）的个人语音设备中的带限抗噪音 | CN201280027248.6 | 2012-05-24 | CN103597541A | 2014-02-19 | N·卡瓦特拉; 阿里·阿卜杜拉扎德米拉尼; 杰弗里·奥尔德森 |
| 一种个人语音设备，例如无线电话，包括噪音消除电路，其适应性地从参考麦克风信号产生抗噪音信号，并且将该抗噪音信号注入到扬声器或其他传感器输出以导致周围语音声音的消除。误差麦克风提供在扬声器附近以测量传感器的输出以便控制抗噪音信号的调适和以估计从噪音消除电路穿过传感器的电声音路径。适应性地产生抗噪音信号来使在误差麦克风处的周围语音声音最小化。执行适应性噪音消除（ANC）功能的处理电路还过滤参考麦克风信号和/或误差麦克风信号的一个或两者，以偏置适应性滤波器在一个或多个频率区域中的调适，以改变在误差麦克风处的周围语音声音的最小化程度。 | ||||||
| 3 | 適合的ノイズキャンセレーション(ANC)を有するパーソナルオーディオデバイスにおける帯域制限アンチノイズ | JP2014513581 | 2012-05-24 | JP6050336B2 | 2016-12-21 | クワトラ, ニティン; アブドラーザデー ミラーニ, アリ; アルダーソン, ジェフリー |
| 4 | Background noise eliminating device | JP15417996 | 1996-06-14 | JPH103299A | 1998-01-06 | TAKADA SHINSUKE |
| PROBLEM TO BE SOLVED: To improve the acoustic feeling and the tone quality by detecting narrow bandwidth noises and switching the noise eliminating characteristics. SOLUTION: An adder 28 performs the noise eliminating process in which estimated background noise signals are subtracted from output signals X(f) of an FFT computing element 4 and processed signals E4(f) are transmitted to a narrow bandwidth noise discriminating section 29. A frequency axis voice detector 31 provides a maximum power level at a signal X(f) and its frequency to the section 29. Then, the section 29 obtains the signal value at the maximum power level frequency for a K-th frame and then, obtains the deviation between the maximum power level and the obtained value. If the deviation is larger than a threshold value, the section 29 discriminates that they are background noises having narrow bandwidth noises ('there exist narrow bandwidth noises'). If the deviation is less than the threshold value, it is discriminated as voices. Then, the noise eliminating characteristics in the output signals from the device are varied in accordance with the discrimination result of the section 29. | ||||||
| 5 | Method for controlling active vibration and device therefor | JP21233095 | 1995-07-18 | JPH08221137A | 1996-08-30 | RAMATSUTO EI SHIYURESHI |
| PROBLEM TO BE SOLVED: To provide an improved active vibration controlling system using a feedback and feedforward sensor input for solving the problem of the control of random and repeated active vibration and the deletion of the noise of the system. SOLUTION: An artificial neural network learns the dynamics of a structural body 570, and provides an output signal following up the state variable of the structural body 570. In one execution of the neural network, plural neurons obtain a biasing input derived from a sensor input and an input from the other neuron of the network. Moreover, each neuron obtains the feedback input from itself. Each input to the neuron is weighted by using a weight function derived in on-line. The neural network supplies a structural parameter and the state variable to an optimal controller 530, and the optimal controller 530 derives a control signal, and provides it to an actuator 560 so that vibration and/or a noise sensed in the system can be canceled. COPYRIGHT: (C)1996,JPO | ||||||
| 6 | Method and device for attenuating active sound | JP11187889 | 1989-04-28 | JPH01314500A | 1989-12-19 | MAAKU SHII ARII |
| PURPOSE: To improve system performance by reducing a modeling range from the cut-off frequency of an input signal. CONSTITUTION: This device has a model input 40 from an input microphone or a transducer 42 and an error input 44 from an error microphone or a transducer 46 and is modeled by an adaptive filter model 38 for outputting a correct signal to an omnidirectional speaker or a transducer toward 48 for supplying cancel sonic waves, so that an error signal at the error input 44 can get closer to a prescribed value, such as '0'. The input signal is high-pass filtered by a high-pass filter 62 to the cut-off frequency of 4.5Hz. The cutoff frequency of a highpass filter 56 is kept at 45Hz. Thus, an adaptive modeling process for modeling the invertion of a plant and an input filter is further improxzed. | ||||||
| 7 | ROAD AND ENGINE NOISE CONTROL | US15764810 | 2016-10-10 | US20180277090A1 | 2018-09-27 | Markus CHRISTOPH |
| Exemplary road and engine noise control systems and methods include directly picking up road noise from a structural element of a vehicle to generate a first sense signal representative of the road noise, directly picking up engine noise from an engine of the vehicle to generate a second sense signal representative of the engine noise, and combining the first sense signal and the second sense signal to provide a combination signal representing the combination of the first sense signal and the second sense signal. The systems and methods further include broadband active noise control filtering to generate a filtered combination signal from the combination signal, converting the filtered combination signal provided by the active noise control filtering into anti-noise and radiating the anti-noise to a listening position in an interior of the vehicle. The filtered combination signal is configured so that the anti-noise reduces the noise at the listening position. | ||||||
| 8 | Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (ANC) | US13472755 | 2012-05-16 | US09824677B2 | 2017-11-21 | Nitin Kwatra; Ali Abdollahzadeh Milani; Jeffrey Alderson |
| A personal audio device, such as a wireless telephone, includes noise canceling 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. An error microphone is provided proximate the speaker to measure the output of the transducer in order to control the adaptation of the anti-noise signal and to estimate an electro-acoustical path from the noise canceling circuit through the transducer. The anti-noise signal is adaptively generated to minimize the ambient audio sounds at the error microphone. A processing circuit that performs the adaptive noise canceling (ANC) function also filters one or both of the reference and/or error microphone signals, to bias the adaptation of the adaptive filter in one or more frequency regions to alter a degree of the minimization of the ambient audio sounds at the error microphone. | ||||||
| 9 | ENGINE NOISE CONTROL | US15294278 | 2016-10-14 | US20170110108A1 | 2017-04-20 | Markus CHRISTOPH; Nikos ZAFEIROPOULOS |
| An exemplary engine noise control includes directly picking up engine noise from an engine of a vehicle at a pick-up position to generate a sense signal representative of the engine noise, and active noise control filtering to generate a filtered sense signal from the sense signal. The control further includes converting the filtered sense signal from the active noise control filtering into anti-noise and radiating the anti-noise to a listening position in an interior of the vehicle. The filtered sense signal is configured so that the anti-noise reduces the engine noise at the listening position. | ||||||
| 10 | Method and device for hybrid active attenuation of vibration, particularly of mechanical, acoustic or similar vibration | US09043822 | 1998-05-13 | US06449369B1 | 2002-09-10 | Christian Carme; Andre Preumont |
| A filtering device consisting of a nonadaptive feedback filter that generates active attenuation of the vibration on the framework, without generating instability in a first frequency band, and an adaptive feedforward filter is disclosed. Feedforward filtering coefficients are adapted in real time according to an algorithm chosen to minimize the energy of the types of vibration which are picked up by a sensing device as a function of the energy of the types of vibration which are picked up by the sensing device, and of the previously measured transfer function, in the presence of a feedback filtering device and in the absence of a feedforward filtering device, between an actuator device and a first sensing device. The device makes it possible to linearize the feedback attenuation throughout a second frequency band which is wider than the first frequency band, to accelerate the convergence of the minimization algorithm and to enhance the robustness of the feedforward filter. | ||||||
| 11 | Active noise cancellation aircraft headset system | US09124686 | 1998-07-29 | US06278786B1 | 2001-08-21 | Jason D. McIntosh |
| An active noise cancellation aircraft headset system. A speaker is mounted within each earcup of a headset for receiving and acoustically transducing a composite noise cancellation signal. A microphone is also mounted within each earcup for transducing acoustic pressure within the earcup to a corresponding analog error signal. An analog filter receives the analog error signal and inverts it to generate an analog broadband noise cancellation signal. The analog error signal is also provided to an analog to digital converter, which receives the analog microphone error signal and converts it to a digital error signal. A DSP takes the digital error signal and, using an adaptive digital feedback filter, generates a digital tonal noise cancellation signal. A digital to analog converter then converts the digital tonal noise cancellation signal to an analog tonal noise cancellation signal so that it can be combined with the analog broadband noise cancellation signal. The resultant composite cancellation signal is provided to the speakers in the earcups to cancel noise within the earcups. The broadband analog cancellation is effective to reduce overall noise within the earcup, and the DSP not only provides active control of the analog cancellation loop gain to maximize the effectiveness of the broadband analog cancellation but also uses the adaptive feedback filter/algorithm to substantially reduce at least the loudest tonal noises penetrating the earcup, including engine and propeller noises, as well as harmonic vibrations of components of the aircraft's fuselage. | ||||||
| 12 | Communication device apparatus and method utilizing pseudonoise signal for acoustical echo cancellation | US447686 | 1995-05-23 | USRE35574E | 1997-07-29 | Steve F. Russell; John F. Doherty |
| A communication device, an apparatus, and a method for acoustic echo cancellation which makes use of a pseudonoise signal. An audio mixer adds the pseudonoise signal to an input signal received from another communication device to produce a first composite signal. An audio system converts the first composite signal to sound in an at least partially enclosed space. The at least partially enclosed space produces an acoustical echo in response. The audio system then converts the acoustical echo and other sounds in the at least partially enclosed space to a second composite signal. A signal processor cross-correlates the second composite signal with the pseudonoise signal to produce an estimate of the overall impulse response of the combined system formed by the at least partially enclosed space and the audio system. The processor then convolves the first composite signal with the impulse response estimate to produce an echo estimation signal. The echo estimation signal is an estimate of the component of the second composite signal which corresponds to the acoustical echo. The processor then subtracts the echo estimation signal from the second composite signal to produce an output signal. | ||||||
| 13 | Broadband noise and vibration reduction | US347523 | 1994-11-30 | US5526292A | 1996-06-11 | Douglas A. Hodgson; Mark R. Jolly; Mark A. Norris; Dino J. Rossetti; Douglas A. Swanson; Steve C. Southward |
| An active noise and vibration cancellation system with broadband control capability. A broadband disturbance signal detector positioned within a closed compartment such as an aircraft cabin or vehicle passenger compartment provides a signal representative of the frequency spectrum and corresponding relative magnitude of a broadband signal emanating from a vibrational energy source to a controller. The controller receives the broadband disturbance signal as well as error signals from error sensors which, by virtue of adaptive filters within the controller, enhance the cancellation capability of the control signals produced by one or more actuators positioned within the compartment. | ||||||
| 14 | Active noise control using noise source having adaptive resonant frequency tuning through stiffness variation | US143602 | 1993-11-01 | US5382134A | 1995-01-17 | Frederic G. Pla; Harindra Rajiyah; Anthony A. Renshaw; Robert A. Hedeen |
| A noise source for an aircraft engine active noise cancellation system in which the resonant frequency of a noise radiating element is tuned to permit noise cancellation over a wide range of frequencies. The resonant frequency of the noise radiating element is tuned by a plurality of force transmitting mechanisms which contact the noise radiating element. Each one of the force transmitting mechanisms includes an expandable element and a spring in contact with the noise radiating element so that excitation of the element varies the spring force applied to the noise radiating element. The elements are actuated by a controller which receives input of a 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 elements and causes the spring force applied to the noise radiating element to be varied. The force transmitting mechanisms can be arranged to either produce bending or linear stiffness variations in the noise radiating element. | ||||||
| 15 | Apparatus for reducing noise in space applicable to vehicle compartment | US996970 | 1992-12-23 | US5325437A | 1994-06-28 | Kazuhiro Doi; Akio Kinoshita; Kenichiro Muraoka |
| In an apparatus for reducing noises in a space, signals related to noise generating conditions of a plurality of noise sources are detected, a signal component of the detected signals is selected on the basis of determination of which signal component is predominant over the other signal component in the noises in the space, and the selected signal component is filtered through adaptively determined filter coefficients to output drive signals to control sound source, the filter coefficients being updated through a control algorithm so as to reduce a residual noise of a residual noise detector such as microphones. The signal components to be selected include a signal component having a relatively high auto-correlated function characteristic and a signal component having a random characteristic. | ||||||
| 16 | Selective interference reduction in transmission lines | US580146 | 1990-09-10 | US5047736A | 1991-09-10 | Rabindra N. Ghose |
| Devices and methods for selectively reducing an electromagnetic or acoustic interference present in a transmission line by an active adaptive means, are described. For the electromagnetic interference, the transmission line may include a waveguide carrying a desired signal along with an undesired interference, the objective of the invention being to reduce the interference selectively at the output of the transmission line without affecting the desired signal substantially. Similarly, for an acoustic interference, the transmission line may include an exhaust pipe of an auto or Diesel engine carrying an undesired acoustic interference or noise, the objective of the invention being to reduce this noise at the output of the pipe. The selective interference reduction in this invention is achieved by sampling the interference almost exclusively from the transmission line, and automatically synthesizing a cancelling interference which, when summed with the interference present in the transmission line, cancels or substantially reduces the interference at the transmission line output. A closed-loop control is used to reverse the polarity and to adjust the amplitude and phase of the cancelling interference until the sum of the synthesized cancelling interference, and that to be reduced in the transmission line, becomes a minimum. | ||||||
| 17 | Engine noise control | US15294278 | 2016-10-14 | US09953627B2 | 2018-04-24 | Markus Christoph; Nikos Zafeiropoulos |
| An exemplary engine noise control includes directly picking up engine noise from an engine of a vehicle at a pick-up position to generate a sense signal representative of the engine noise, and active noise control filtering to generate a filtered sense signal from the sense signal. The control further includes converting the filtered sense signal from the active noise control filtering into anti-noise and radiating the anti-noise to a listening position in an interior of the vehicle. The filtered sense signal is configured so that the anti-noise reduces the engine noise at the listening position. | ||||||
| 18 | Active vibration control method and apparatus | US276551 | 1994-07-18 | US6137886A | 2000-10-24 | Rahmat A. Shoureshi |
| An improved active vibration control system using feedback and pseudo-feedforward sensor inputs is provided for solving the problem of random and repetitive active vibration control and noise cancellation in a system. In a first embodiment of the invention, an artificial neural network is used for learning the dynamics of a structure and for providing output signals that follow the state variables of the structure. In one implementation of the neural network, a plurality of neurons obtain biasing inputs derived from sensor inputs, as well as inputs from the other neurons in the network. Further, each neuron obtains a feedback input from itself. Each input to a neuron is weighted using a weighting function derived on-line. The neural network supplies structure parameters and state variables to an optimal controller which derives and provides a control signal to the actuators so as to counteract vibrations and/or noise sensed in the system. In a second embodiment an optimal controller utilizing a modified generalized predictive control algorithm is used to to consider the limitations on the physical characteristics of the actuator(s), on-line, in terms of the output level and the rate of change of the output in the system. Additional embodiments wherein an optimized control signal is sent to the actuator(s) to minimize vibration incident to the structure are provided. | ||||||
| 19 | Method for supplying a device or system with an alternating, pulsating, or cyclic flow of power or energy | US992394 | 1997-12-17 | US6095029A | 2000-08-01 | Reinhold Schneckenburger |
| The invention relates to a method for supplying a device or system with a pulsating or cyclic flow of power or energy that alternates in the manner of a noise, with the noise having a spectral amplitude or intensity distribution that is essentially the inverse of the amplitude frequency pattern of a noise parameter of the device or system so that low-noise transmission of power or energy is made possible. | ||||||
| 20 | Adaptive control system with efficiently constrained adaptation | US941828 | 1997-10-01 | US6094601A | 2000-07-25 | Steven R. Popovich |
| An adaptive control system implements a back-projection technique to limit adaptation of adaptive parameters in the system so that system actuators are not driven beyond desired physical limitations. When the optimal controller solution lies outside of a desired region in the parameter space, chosen in accordance with the physical limitations of the system, adaptation is back-projected onto or near a smooth convex surface defining the edge of the desired region. Adaptation is preferably normalized to improve adaptation convergence. Back-projection is preferably compensated in accordance with adaptation normalization to facilitate convergence. To lessen computational burdens, adaptation and/or back-projection is accomplished in accordance with a time-sharing technique in which orthogonal components are separately processed. The technique can be implemented in tonal control systems, and in systems capable of controlling non-periodic disturbances. | ||||||
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