公开(公告)号：US12148413B2

公开(公告)日：2024-11-19

申请号：US18451457

申请日：2023-08-17

Applicant: Bose Corporation

Inventor： Ricardo Federico Carreras ,  Michael P. O'Connell ,  Christopher J. Mulhearn ,  Joseph H. Cattell

IPC: G10K11/178 ,  G06N20/00

Abstract: Various implementations include a computational architecture for a personal active noise reduction (ANR) device. The device includes a communication interface that receives an audio stream, a driver, a microphone system and an ANR processing platform. The platform includes a first DSP configured to: receive the audio stream and signals from the microphone system, perform ANR on the audio stream according to a set of parameters in the first DSP, and output a processed audio stream. The platform includes a second DSP configured to: generate state data in response to an analysis of the source audio stream, signals from the microphone system, and the processed audio stream; and alter the operational parameters on the first DSP. The platform includes a general purpose processor configured to characterize a malfunction in response to instability or error condition events detected by the second DSP.

公开(公告)号：US11785382B2

公开(公告)日：2023-10-10

申请号：US17959475

申请日：2022-10-04

Applicant: Bose Corporation

Inventor： Michael P. O'Connell ,  Joseph H. Cattell ,  Dale Ian McElhone

IPC: H04R3/02 ,  H04R1/10

CPC classification number: H04R3/02 ,  H04R1/1016

Abstract: Various aspects include active noise reduction (ANR) devices and approaches, one approach including: receiving an input signal representing audio captured by a feedforward microphone of an ANR headphone; receiving an error signal representing audio captured by an error measurement sensor; generating an anti-noise signal configured to reduce a noise signal over a frequency range; and applying a gain to at least one of the input signal or the anti-noise signal over the frequency range based on the error signal, wherein the applied gain is configured to enhance noise reduction for a plurality of users having distinct fits for the ANR headphone.

公开(公告)号：US11483655B1

公开(公告)日：2022-10-25

申请号：US17218559

申请日：2021-03-31

Applicant: Bose Corporation

Inventor： Michael P. O'Connell ,  Joseph H. Cattell ,  Dale Ian McElhone

IPC: H04R3/02 ,  H04R1/10

Abstract: Various aspects include active noise reduction (ANR) devices and approaches, one approach including: receiving an input signal representing audio captured by a feedforward microphone of an ANR headphone; receiving an error signal representing audio captured by an error measurement sensor; generating an anti-noise signal configured to reduce a noise signal over a frequency range; and applying a gain to at least one of the input signal or the anti-noise signal over the frequency range based on the error signal, where the gain is calculated by: filtering the anti-noise signal over the frequency range to generate a filtered feedforward signal, and filtering the error signal over the frequency range to generate a filtered error signal; estimating a feedforward path contribution to the error signal; and determining the gain based on a correlation between the filtered error signal and the filtered feedforward signal with the assigned feedforward path contribution to the error signal.

公开(公告)号：US20220020351A1

公开(公告)日：2022-01-20

申请号：US17488509

申请日：2021-09-29

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：US20240112662A1

公开(公告)日：2024-04-04

申请号：US18527736

申请日：2023-12-04

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

CPC classification number: G10K11/1781 ,  H04R1/1083 ,  H04R3/002 ,  G10K2210/1081 ,  G10K2210/3026 ,  G10K2210/3056 ,  H04R2460/01

Abstract: Various aspects include a wearable audio device having active noise reduction (ANR). In some cases, a method for processing audio signals includes receiving a noise reduction signal configured to modify an audio signal and generate a noise reduced audio signal, the noise reduction signal having a nominal loop gain; and generating an adjusted noise reduction signal in response to a detected adverse low frequency event, the adjusted noise reduction signal having a modulated loop gain configured to reduce artifacts in the noise reduced audio signal.

公开(公告)号：US11763794B2

公开(公告)日：2023-09-19

申请号：US17836423

申请日：2022-06-09

Applicant: Bose Corporation

Inventor： Ricardo Federico Carreras ,  Michael P. O'Connell ,  Christopher J. Mulhearn ,  Joseph H. Cattell

IPC: G10K11/178 ,  G06N20/00

CPC classification number: G10K11/17881 ,  G06N20/00 ,  G10K11/17854 ,  G10K2210/1081 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3028 ,  G10K2210/3056

Abstract: Various implementations include a method for implementing a computational architecture for a personal active noise reduction (ANR) device. A method includes receiving a source audio stream with a first DSP and performing ANR on the source audio stream utilizing operational parameters stored in the first DSP; outputting a processed audio stream from the first DSP; generating state data with a second DSP in response to an analysis of at least one of the source audio stream, microphone inputs and the processed audio stream, and communicating signals to the first DSP over a common bus coupled to the first and second DSPs to alter the operational parameters in the first DSP; and utilizing a general purpose processor coupled to both the first DSP and the second DSP to communicate control signals with a communication interface, process state data from the second DSP, and alter the operational parameters in the first DSP.

公开(公告)号：US20250037699A1

公开(公告)日：2025-01-30

申请号：US18917266

申请日：2024-10-16

Applicant: Bose Corporation

Inventor： Ricardo Federico Carreras ,  Michael P. O'Connell ,  Christopher J. Mulhearn ,  Joseph H. Cattell

IPC: G10K11/178 ,  G06N20/00

Abstract: Various implementations include a computational architecture for a personal active noise reduction (ANR) device. The device includes a communication interface that receives an audio stream, a driver, a microphone system and an ANR processing platform. The platform includes a first DSP configured to perform ANR on the audio stream according to a set of parameters in the first DSP. The platform includes a second DSP processor configured to detect at least one of a sound pressure level (SPL) or a performance characteristic, and includes a general purpose (GP) processor operationally coupled to the first DSP processor and the second DSP processor and configured to achieve a desired user experience in response to at least one of the SPL or the performance characteristic detected by the second DSP deviating from a corresponding threshold or rule.

公开(公告)号：US20230144087A1

公开(公告)日：2023-05-11

申请号：US18149834

申请日：2023-01-04

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

CPC classification number: G10K11/1781 ,  H04R1/1083 ,  H04R3/002 ,  G10K2210/1081 ,  G10K2210/3026 ,  G10K2210/3056 ,  H04R2460/01

Abstract: Various aspects include a wearable audio device having active noise reduction (ANR). In some cases, an ANR system for a wearable audio device includes: a fixed filter that receives a signal from a feedback microphone and outputs a noise reduction signal, where the fixed filter is configured to provide ANR with a nominal loop gain; and a tunable filter that outputs an adjusted noise reduction signal by modulating the nominal loop gain in response to low frequency noise being detected in the noise reduction signal, where modulating the nominal loop gain includes reducing low frequency ANR performance.

公开(公告)号：US11568849B2

公开(公告)日：2023-01-31

申请号：US17488509

申请日：2021-09-29

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：US20220322002A1

公开(公告)日：2022-10-06

申请号：US17218559

申请日：2021-03-31

Applicant: Bose Corporation

Inventor： Michael P. O'Connell ,  Joseph H. Cattell ,  Dale Ian McElhone

IPC: H04R3/02 ,  H04R1/10

Abstract: Various aspects include active noise reduction (ANR) devices and approaches, one approach including: receiving an input signal representing audio captured by a feedforward microphone of an ANR headphone; receiving an error signal representing audio captured by an error measurement sensor; generating an anti-noise signal configured to reduce a noise signal over a frequency range; and applying a gain to at least one of the input signal or the anti-noise signal over the frequency range based on the error signal, where the gain is calculated by: filtering the anti-noise signal over the frequency range to generate a filtered feedforward signal, and filtering the error signal over the frequency range to generate a filtered error signal; estimating a feedforward path contribution to the error signal; and determining the gain based on a correlation between the filtered error signal and the filtered feedforward signal with the assigned feedforward path contribution to the error signal.