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ANR with adaptive gain

A microphone and filter technology, applied in the field of personal active noise reduction equipment, can solve problems such as narrow audible frequency range, short battery life, and unsatisfactory

Active Publication Date: 2012-05-09
BOSE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Unfortunately, despite various improvements over time, existing personal ANR devices continue to suffer from several shortcomings
Foremost among these disadvantages are an undesirably high power consumption rate which in turn leads to short battery life, an undesirably narrow audible frequency range in which ANR is used to counteract undesired ambient noise sounds, an The situation of unpleasant sounds for people, and the situation that actually produces more unwanted noise sounds than any can reduce the unwanted ambient sounds

Method used

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Examples

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Embodiment Construction

[0031] What is disclosed and claimed herein is intended to be applicable to a wide variety of personal ANR devices, that is, configured to be worn at least in part by a user near at least one of the user's ears for targeting the at least one of the user's ears. The ear is the device that provides ANR functionality. It should be noted that although various specific implementations of personal ANR devices, such as headsets, two-way communication headsets, earphones, earbuds, wireless headsets (also known as "earphones"), are described with a certain degree of detail, Kit") and ear protectors, etc., but this introduction to specific implementations is intended to aid understanding by using examples and should not be viewed as limiting the scope of the disclosure or the scope covered by the claims.

[0032] What is disclosed and claimed herein is intended to be applicable to personal ANR devices that provide two-way voice communication, one-way voice communication (ie, audio-acous...

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PUM

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Abstract

An ANR circuit, possibly of a personal ANR device, monitors a sound level of environmental sounds detected by a microphone external to an earpiece in which the ANR circuit is providing feedback-based ANR, and increases or decreases the degree of feedback-based ANR provided in response to the external microphone detecting a higher or lower sound level, respectively. Increasing and decreasing the degree of feedback-based ANR provided may be carried out by changing a variable loop gain of the ANR circuit and / or a range of frequencies of environmental sounds attenuated by the feedback-based ANR. An ANR circuit, possibly of a personal ANR device, reduces the degree of feedforward-based ANR that it provides in response to receiving an indication of the operation of a manually-operable control. The reduction of degree of feedforward-based ANR may be effected by turning off or otherwise deactivating the provision of feedforward-based ANR, reducing a range of frequencies of environmental noisesounds attenuated by the feedforward-based ANR to provide less attenuation of sounds detected by a feedforward microphone that are in a range of frequencies deemed to be those of human speech, and / orcreating a notch in the range of frequencies of environmental noise sounds attenuated by the feedforward-based ANR to provide less attenuation of sounds detected by the feedforward microphone that are in a range of frequencies deemed to be those of human speech.

Description

technical field [0001] The present disclosure relates to personal active noise reduction (ANR) devices for reducing acoustic noise near at least one of a user's ears. Background technique [0002] Headphones and other physical configurations of personal ANR devices worn around a user's ear for the purpose of acoustically isolating the user's ear from unwanted ambient noise have become commonplace. In particular, ANR headphones, in which the unwanted ambient noise sounds are counteracted by the active generation of anti-noise sounds, have become very popular, even when compared to only passive noise reduction in which the user's ears are simply physically isolated from the ambient noise ( The same goes for headphones or earbuds with PNR) technology. Of particular interest to users is the ability to also incorporate audio listening functionality so that the user can listen to electronically provided audio (e.g., playback of recorded audio or audio received from another device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/178
CPCG10K2210/30391G10K2210/3056H04R1/1016G10K2210/503G10K11/178H04B1/202G10K11/1788G10K2210/3026G10K2210/108G10K2210/3214H04R2460/11G10K2210/1081H04R1/2803G10K11/17821G10K11/17833G10K11/17837G10K11/17854G10K11/17855G10K11/17857G10K11/17881G10K11/17885
Inventor M·乔霍R·F·卡雷拉斯D·M·高格尔S·H·伊萨贝尔
Owner BOSE CORP
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