公开(公告)号：US10244306B1

公开(公告)日：2019-03-26

申请号：US15988221

申请日：2018-05-24

Applicant: BOSE CORPORATION

Inventor： Emery M. Ku ,  David J. Warkentin

IPC: H04B15/00 ,  H04R1/10 ,  H04R3/00 ,  G10K11/178 ,  H04R5/033 ,  H04R1/22

Abstract: Audio systems and methods are provided that detect instability in active feedback noise reduction circuitry. An acoustic transducer converts a driver signal into an acoustic signal, and a microphone provides a feedback signal. The feedback signal is processed, through a first transfer function, to provide an anti-noise signal. The driver signal is based at least in part upon the anti-noise signal, to reduce acoustic noise in the environment of the acoustic transducer. The driver signal is also filtered by a filter having a second transfer function that is inverse of the first transfer function, to provide a reference signal. The feedback signal is compared to the reference signal to determine a feedback instability, based upon the comparison.

公开(公告)号：US20180286373A1

公开(公告)日：2018-10-04

申请号：US15473889

申请日：2017-03-30

Applicant: Bose Corporation

Inventor： Michael O'Connell ,  Joseph H. Cattell ,  David J. Warkentin

IPC: G10K11/178 ,  H04R1/10

CPC classification number: G10K11/178 ,  G10K11/17881 ,  G10K2210/1081 ,  G10K2210/3028 ,  G10K2210/3056 ,  H04R1/1041 ,  H04R1/1083 ,  H04R3/005 ,  H04R2460/01

Abstract: The technology described in this document can be embodied in a method that includes receiving an input signal representing audio captured by one or more sensors of an active noise reduction (ANR) headphone, and generating, based on the input signal, a first signal by a compensator disposed in an ANR signal flow path. The method also includes determining one or more characteristics of the first signal, and selecting, based on the one or more characteristics of the first signal, a plurality of filter coefficients for a digital filter disposed in series with the compensator in the ANR signal flow path. The filter coefficients are selected in accordance with a target frequency response of the digital filter. The method further includes generating, by processing the input signal using the plurality of filter coefficients of the digital filter, a feedback control signal for an electroacoustic transducer of the ANR headphone.

公开(公告)号：US09316667B2

公开(公告)日：2016-04-19

申请号：US13676582

申请日：2012-11-14

Applicant: Bose Corporation

Inventor： Upendra Ummethala ,  David J. Warkentin

IPC: G01M17/04 ,  G01P21/00

CPC classification number: G01P21/00

Abstract: In an aspect, in general, a system and method compensate for a misalignment characteristic of one or more acceleration sensors fixed to a sprung mass of a vehicle, each acceleration sensor having a location on the vehicle and a desired orientation relative to the vehicle.

Abstract translation: 在一方面，一般来说，系统和方法补偿固定在车辆弹簧质量上的一个或多个加速度传感器的不对准特性，每个加速度传感器具有车辆上的位置和相对于车辆的期望取向。

公开(公告)号：US20240046910A1

公开(公告)日：2024-02-08

申请号：US17881982

申请日：2022-08-05

Applicant: Bose Corporation

Inventor： David J. Warkentin

IPC: G10K11/178

CPC classification number: G10K11/17853 ,  G10K2210/3026 ,  G10K2210/3027

Abstract: A playback audio signal is combined with a feedback signal from a feedback microphone to provide a first combined signal. The first combined signal is filtered with a feedback filter to provide a driver command signal. The driver command signal is provided to an acoustic transducer for transduction to acoustic energy. The first combined signal is compared with the feedback signal to detect a feedback instability based upon the comparison.

公开(公告)号：US11164554B2

公开(公告)日：2021-11-02

申请号：US16811148

申请日：2020-03-06

Applicant: Bose Corporation

Inventor： Ole Mattis Nielsen ,  David J. Warkentin ,  Lei Cheng ,  Brandon Lee Olmos ,  Michael P. O'Connell

IPC: G10K11/178 ,  H04R1/10 ,  H04R3/00

Abstract: Various aspects include a wearable audio device having active noise reduction (ANR), where the ANR device includes: a feedback microphone; an electroacoustic transducer; and a feedback compensator configured to output a noise reduction signal to the electroacoustic transducer in response to a feedback signal from the feedback microphone, wherein the feedback compensator includes a tunable filter that modulates a loop gain in response to an adverse low frequency event being detected in the noise reduction signal outputted from the tunable filter, wherein the tunable filter is configured to maintain a substantially similar loop gain shape near a low frequency cross-over as the low frequency cross-over changes during loop gain modulation.

公开(公告)号：US09446651B2

公开(公告)日：2016-09-20

申请号：US14790070

申请日：2015-07-02

Applicant: Bose Corporation

Inventor： Marco Giovanardi ,  David J. Warkentin

IPC: B60G17/0165

CPC classification number: B60G17/0165 ,  B60G2400/821 ,  B60G2600/182 ,  B60G2800/164

Abstract: A vehicle suspension and wheel damper using anti-causal filtering. Information from in front of a wheel or information about an operating condition of a vehicle is used to anti-causally determine a response of an active suspension associated with the wheel.