公开(公告)号：US09460732B2

公开(公告)日：2016-10-04

申请号：US14138587

申请日：2013-12-23

Applicant: Analog Devices, Inc.

Inventor： David Wingate ,  Noah Stein

IPC: G10L21/0272 ,  H04R1/40

CPC classification number: G10L21/0272 ,  H04R1/406 ,  H04R2201/003 ,  H04R2430/21

Abstract: In one aspect, a microphone with closely spaced elements is used to acquire multiple signals from which a signal from a desired source is separated. The signal separation approach uses a combination of direction-of-arrival information or other information determined from variation such as phase, delay, and amplitude among the acquired signals, as well as structural information for the signal from the source of interest and/or for the interfering signals. Through this combination of information, the elements may be spaced more closely than may be effective for conventional beamforming approaches. In some examples, all the microphone elements are integrated into a single a micro-electrical-mechanical system (MEMS).

Abstract translation: 在一个方面，具有紧密间隔的元件的麦克风用于采集多个信号，来自期望的源的信号从该信号被分离。 信号分离方法使用到达方向信息或从获取的信号中的相位，延迟和幅度等变化确定的其他信息的组合，以及来自感兴趣来源的信号的结构信息和/或用于 干扰信号。 通过这种信息的组合，元件可以比对于常规波束成形方法有效的间隔更紧密。 在一些示例中，所有麦克风元件被集成到单个微机电系统（MEMS）中。

公开(公告)号：US10547953B2

公开(公告)日：2020-01-28

申请号：US15523631

申请日：2015-11-09

Applicant: Analog Devices, Inc.

Inventor： David Wingate ,  Isaac Chase Novet

IPC: H04R19/04 ,  H04R3/06 ,  G01L9/12 ,  H04R23/00 ,  H04R19/00

Abstract: Sound waves cause pressure changes in the air, and the pressure changes cause changes in the dielectric constant of air. Capacitive sensor measurements indicative of the changes in the dielectric constant of air can be processed to extract features associated with sound waves in the air. The features can include sound pressure levels represented and recordable as audio samples. Furthermore, the features can help identify types of sounds, determine direction of travel of the sound waves, and/or determine the source location of the audio. Instead of relying on movement of a mechanical member to transduce sound waves through a port into an electrical signal, an improved microphone uses capacitive sensing to directly sample and sense static pressure as well as dynamic pressure or pressure changes in the air to derive audio samples. The resulting microphone avoids disadvantages of the conventional microphone having the moving mechanical member and port.

公开(公告)号：US20150086038A1

公开(公告)日：2015-03-26

申请号：US14494838

申请日：2014-09-24

Applicant: Analog Devices, Inc.

Inventor： Noah Stein ,  Johannes Traa ,  David Wingate

IPC: H04R1/32

CPC classification number: H04R1/326 ,  G10L21/0272 ,  G10L2021/02166 ,  H04R1/406 ,  H04R2201/003 ,  H04R2430/21

Abstract: An approach to processing of acoustic signals acquired at a user's device include one or both of acquisition of parallel signals from a set of closely spaced microphones, and use of a multi-tier computing approach in which some processing is performed at the user's device and further processing is performed at one or more server computers in communication with the user's device. The acquired signals are processed using time versus frequency estimates of both energy content as well as direction of arrival. In some examples, a non-negative matrix or tensor factorization approach is used to identify multiple sources each associated with a corresponding direction of arrival of a signal from that source. In some examples, data characterizing direction of arrival information is passed from the user's device to a server computer where direction-based processing is performed.

Abstract translation: 处理在用户设备处获取的声学信号的方法包括从一组紧密间隔的麦克风中获取并行信号的一个或两个，以及使用多层计算方法，其中在用户设备处进行一些处理 在与用户的设备通信的一个或多个服务器计算机上执行处理。 所获取的信号使用能量含量以及到达方向的时间与频率估计来处理。 在一些示例中，使用非负矩阵或张量因子分解方法来识别每个与来自该源的信号的相应到达方向相关联的多个源。 在一些示例中，表征到达信息方向的数据从用户设备传递到执行方向处理的服务器计算机。

公开(公告)号：US10269343B2

公开(公告)日：2019-04-23

申请号：US15505736

申请日：2015-08-27

Applicant: Analog Devices, Inc.

Inventor： David Wingate

IPC: H04R3/00 ,  G10L15/00 ,  G10L15/20 ,  G10L21/0272 ,  G10L15/22 ,  G10L21/0216 ,  G10L25/84 ,  H04R1/40 ,  G10L21/0208 ,  G10L15/01

Abstract: The present disclosure relates generally to improving audio processing using an intelligent microphone and, more particularly, to techniques for processing audio received at a microphone with integrated analog-to-digital conversion, digital signal processing, acoustic source separation, and for further processing by a speech recognition system. Embodiments of the present disclosure include intelligent microphone systems designed to collect and process high-quality audio input efficiently. Systems and method for audio processing using an intelligent microphone include an integrated package with one or more microphones, analog-to-digital converters (ADCs), digital signal processors (DSPs), source separation modules, memory, and automatic speech recognition. Systems and methods are also provided for audio processing using an intelligent microphone that includes a microphone array and uses a preprogrammed audio beamformer calibrated to the included microphone array.

公开(公告)号：US09420368B2

公开(公告)日：2016-08-16

申请号：US14494838

申请日：2014-09-24

Applicant: Analog Devices, Inc.

Inventor： Noah Stein ,  Johannes Traa ,  David Wingate

IPC: H04R1/32 ,  G10L21/0272 ,  H04R1/40 ,  G10L21/0216

CPC classification number: H04R1/326 ,  G10L21/0272 ,  G10L2021/02166 ,  H04R1/406 ,  H04R2201/003 ,  H04R2430/21

Abstract: An approach to processing of acoustic signals acquired at a user's device include one or both of acquisition of parallel signals from a set of closely spaced microphones, and use of a multi-tier computing approach in which some processing is performed at the user's device and further processing is performed at one or more server computers in communication with the user's device. The acquired signals are processed using time versus frequency estimates of both energy content as well as direction of arrival. In some examples, a non-negative matrix or tensor factorization approach is used to identify multiple sources each associated with a corresponding direction of arrival of a signal from that source. In some examples, data characterizing direction of arrival information is passed from the user's device to a server computer where direction-based processing is performed.

Abstract translation: 处理在用户设备处获取的声学信号的方法包括从一组紧密间隔的麦克风中获取并行信号的一个或两个，以及使用多层计算方法，其中在用户设备处进行一些处理 在与用户的设备通信的一个或多个服务器计算机上执行处理。 所获取的信号使用能量含量以及到达方向的时间与频率估计来处理。 在一些示例中，使用非负矩阵或张量因子分解方法来识别每个与来自该源的信号的相应到达方向相关联的多个源。 在一些示例中，表征到达信息方向的数据从用户设备传递到执行方向处理的服务器计算机。

公开(公告)号：US09232332B2

公开(公告)日：2016-01-05

申请号：US14341998

申请日：2014-07-28

Applicant: Analog Devices, Inc.

Inventor： Juri Ranieri ,  David Wingate ,  Noah Daniel Stein

IPC: H04R29/00

CPC classification number: H04R29/005 ,  H04R2201/003

Abstract: The disclosed apparatus, systems, and methods provide a calibration technique for calibrating a set of microphones. The disclosed calibration technique is configured to calibrate the microphones with respect to a reference microphone and can be used in actual operation rather than a testing environment. The disclosed calibration technique can estimate both the magnitude calibration factor for compensating magnitude sensitivity variations and the relative phase error for compensating phase delay variations. In addition, the disclosed calibration technique can be used even when multiple acoustic sources are present. The disclosed technique is particularly well suited to calibrating a set of microphones that are omnidirectional and sufficiently close to one another.

Abstract translation: 所公开的装置，系统和方法提供了用于校准一组麦克风的校准技术。 所公开的校准技术被配置为相对于参考麦克风校准麦克风，并且可以用于实际操作而不是测试环境。 所公开的校准技术可以估计用于补偿幅度灵敏度变化的幅度校准因子和用于补偿相位延迟变化的相对相位误差。 此外，即使存在多个声源，也可以使用所公开的校准技术。 所公开的技术特别适合于校准一组麦克风，这些麦克风是全向且足够接近的。

公开(公告)号：US10684728B2

公开(公告)日：2020-06-16

申请号：US15517135

申请日：2015-09-16

Applicant: Analog Devices, Inc.

Inventor： David Wingate

IPC: G06F3/044 ,  G06F3/041

Abstract: Capacitive sensing can be used to measure electrostatic features of a space. Rudimentary capacitive sensing can be blurry. For instance, the resolution of a capacitive sensor generating a simple electric field is not very high, and the response to the simple electric field is also not very high. Using many capacitive sensors and special sets of excitation signals exciting the capacitive sensors, the capacitive sensors can generate specialized electrostatic fields. Because the specialized electrostatic fields provide different views of the space, enhanced inferences can be made from measurements of responses to those specialized electrostatic fields. Selecting certain specialized electrostatic fields can allow capacitive sensors to sense a focused region of the space. Repeating the steps with varied electrostatic fields can allow capacitive sensors to make enhanced inferences for many focused regions of the space, thereby increasing the resolution of capacitive sensing.

公开(公告)号：US09232333B2

公开(公告)日：2016-01-05

申请号：US14444034

申请日：2014-07-28

Applicant: Analog Devices, Inc.

Inventor： Juri Ranieri ,  David Wingate ,  Noah Daniel Stein

IPC: H04R29/00

CPC classification number: H04R29/005 ,  H04R2201/003

Abstract: The disclosed apparatus, systems, and methods provide a calibration technique for calibrating a set of microphones. The disclosed calibration technique is configured to calibrate the microphones with respect to a reference microphone and can be used in actual operation rather than a testing environment. The disclosed calibration technique can estimate both the magnitude calibration factor for compensating magnitude sensitivity variations and the relative phase error for compensating phase delay variations. In addition, the disclosed calibration technique can be used even when multiple acoustic sources are present. The disclosed technique is particularly well suited to calibrating a set of microphones that are omnidirectional and sufficiently close to one another.

Abstract translation: 所公开的装置，系统和方法提供了用于校准一组麦克风的校准技术。 所公开的校准技术被配置为相对于参考麦克风校准麦克风，并且可以用于实际操作而不是测试环境。 所公开的校准技术可以估计用于补偿幅度灵敏度变化的幅度校准因子和用于补偿相位延迟变化的相对相位误差。 此外，即使存在多个声源，也可以使用所公开的校准技术。 所公开的技术特别适合于校准一组麦克风，这些麦克风是全向且足够接近的。

公开(公告)号：US20140226838A1

公开(公告)日：2014-08-14

申请号：US14138587

申请日：2013-12-23

Applicant: Analog Devices, Inc.

Inventor： David Wingate ,  Noah Stein

IPC: H04R3/00

CPC classification number: G10L21/0272 ,  H04R1/406 ,  H04R2201/003 ,  H04R2430/21

Abstract: In one aspect, a microphone with closely spaced elements is used to acquire multiple signals from which a signal from a desired source is separated. The signal separation approach uses a combination of direction-of-arrival information or other information determined from variation such as phase, delay, and amplitude among the acquired signals, as well as structural information for the signal from the source of interest and/or for the interfering signals. Through this combination of information, the elements may be spaced more closely than may be effective for conventional beamforming approaches. In some examples, all the microphone elements are integrated into a single a micro-electrical-mechanical system (MEMS).

Abstract translation: 在一个方面，具有紧密间隔的元件的麦克风用于采集多个信号，来自期望的源的信号从该信号被分离。 信号分离方法使用到达方向信息或从获取的信号中的相位，延迟和幅度等变化确定的其他信息的组合，以及来自感兴趣来源的信号的结构信息和/或用于 干扰信号。 通过这种信息的组合，元件可以比对于常规波束成形方法有效的间隔更紧密。 在一些示例中，所有麦克风元件被集成到单个微机电系统（MEMS）中。