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Active noise eliminating earphone and noise eliminating method thereof

A headphone and noise cancellation technology, applied in active noise control, headphones to reduce ambient noise, stereo communication headphones, etc., can solve the problems of high price and large size, and achieve the effects of fast response time, reduced size, and reduced cost

Inactive Publication Date: 2009-04-01
FU ZHUN PRECISION IND SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The feature of earmuff active noise canceling earphones is that there is a microphone on the inside and outside respectively to receive the external signal and the error signal of internal noise cancelling. Larger and more expensive, so needs to be improved

Method used

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  • Active noise eliminating earphone and noise eliminating method thereof
  • Active noise eliminating earphone and noise eliminating method thereof
  • Active noise eliminating earphone and noise eliminating method thereof

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Embodiment Construction

[0015] Further description will be made below in conjunction with the embodiments with reference to the accompanying drawings.

[0016] Fig. 2 is the measurement diagram of the transfer function of the preferred embodiment of the present invention, wherein the earphone is the existing active noise canceling earphone 20 shown in Fig. 1, the active noise canceling earphone 20 includes an earmuff 21, the earmuff 21 An external microphone 22 is provided outside, and a speaker 23 and an internal microphone 24 are provided in the earmuffs 21. For measurement needs, a frequency analyzer (Frequency Analyzer) 25 and another speaker 27 are first provided. A noise generator (Noise Generator) 26 is provided. There are two transfer functions to be measured in the present invention, one is the transfer function from the external microphone 22 to the internal microphone 24 , and the other is the transfer function from the speaker 23 to the internal microphone 24 .

[0017] The measurement m...

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PUM

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Abstract

An active noise-eliminating earphone comprises a shell, a horn disposed in shell, an external microphone disposed outside of the shell. A controller is connected between the horn and the external microphone, and stores a characteristic related function; external microphone receives external noise message which passes through controller and be processed by characteristic related function in the controller; the horn emits anti-noise signal; external noise signal transmits to shell and counteracts with anti-noise signal emitted by the horn. Only a microphone installed outside of shell can achieve noise-eliminating function, which reduces cost and size, and the effect for eliminating noise is obvious, response time is short, and noise-eliminating efficiency is promoted. The invention also comprises a noise-eliminating method of active noise-eliminating earphone.

Description

technical field [0001] The invention relates to a noise canceling earphone and a noise canceling method thereof, in particular to an active noise canceling earphone and a noise canceling method thereof. Background technique [0002] With the continuous progress of society and the continuous improvement of people's living standards, people have higher and higher requirements for sound quality. After studying or working, most people like to wear earphones to enjoy music, but the sound from earphones is easily affected. The interference of external noise will affect the sound quality of the sound, so how to eliminate the noise has become very important. [0003] At present, the industry mainly adopts the method of Active Noise Control (ANC) to eliminate noise. The so-called active noise control is to first generate an anti-phase sound wave opposite to the original noise signal, and use the principle of sound wave interference to eliminate the original noise. The signal produce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/10H04R3/00
CPCG10K11/178H04R1/1008G10K2210/3055G10K2210/1081H04R1/1083H04R5/033G10K11/17857G10K11/17885G10K11/17817G10K11/17815G10K11/17854G10K11/17881G10K11/1785
Inventor 欧昆应杨宗龙许胜凯
Owner FU ZHUN PRECISION IND SHENZHEN
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