Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Active noise reduction method and device

An active noise reduction and noise technology, applied in earphones to reduce environmental noise, sounding equipment, instruments, etc., can solve problems such as inability to passively isolate noise and large differences in audio playback effects.

Active Publication Date: 2021-11-19
HUAWEI TECH CO LTD
View PDF10 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Because the semi-open earphone has no rubber cover, it cannot passively isolate noise, and the audio playback effect of the semi-open earphone is different under different ears and different wearing postures Larger, so for semi-open headphones, active noise reduction is an important issue

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Active noise reduction method and device
  • Active noise reduction method and device
  • Active noise reduction method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0112] The term "and / or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations.

[0113] The terms "first" and "second" in the description and claims of the embodiments of the present application are used to distinguish different objects, rather than to describe a specific order of objects. For example, the first signal, the second signal, etc. are used to distinguish different signals, not to describe a specific sequence of signals.

[0114] In the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations or illustrations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application shall not be interpreted as being more preferred or more advantageous t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The embodiment of the invention provides an active noise reduction method and device, relates to the technical field of audio, and can weaken the interference of abnormal noise and improve the stability of an earphone. The method is applied to an earphone with an ANC function, wherein the earphone comprises a reference microphone and an error microphone, and the earphone is in an ANC working mode. The method comprises the steps of detecting whether abnormal noise exists or not, collecting sound signals through the reference microphone and the error microphone of the earphone under the condition that the abnormal noise exists, and generating a reverse noise signal according to the sound signal collected by the reference microphone and the sound signal collected by the error microphone, wherein the reverse noise signal is used for weakening the in-ear noise signal of the user.

Description

[0001] This application claims the priority of the Chinese patent application with the application number 202010407692.7 and the application title "An Active Noise Reduction Method for Semi-Open Headphones" submitted to the State Intellectual Property Office on May 14, 2020, the entire contents of which are incorporated by reference incorporated in this application. technical field [0002] The embodiments of the present application relate to the field of audio technology, and in particular, to an active noise reduction method and device. Background technique [0003] Compared with in-ear earphones, semi-open earphones have no rubber cover on the sound outlet, which is more comfortable to wear and has no stethoscope effect, so it is suitable for long-term wearing. [0004] Since the semi-open earphones have no rubber cover, they cannot passively isolate noise, and the audio playback effect of the semi-open earphones varies greatly with different ears and different wearing po...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/10G10K11/178
CPCH04R1/1008H04R1/1083G10K11/1781G10K11/17879Y02D30/70
Inventor 欧阳山李玉龙范泛覃景繁余晓伟杨小洪孙宇皓
Owner HUAWEI TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com