Active noise control system and design method thereof

A technology for active noise control and environmental noise, applied in the direction of sounding equipment, telephone structure, instruments, etc., can solve the problems of affecting the noise reduction effect, reducing the noise reduction effect, instability, etc., and achieve the effect of good noise reduction effect.

Active Publication Date: 2012-07-04
AAC TECH PTE LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This phenomenon is often ignored by other noise cancellation methods, resulting in reduced noise cancellation effects, instability and even failure
In addition, the noise reduction methods in the related art do not consider the impact of wind noise on th...

Method used

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  • Active noise control system and design method thereof
  • Active noise control system and design method thereof
  • Active noise control system and design method thereof

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Embodiment Construction

[0065] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0066] Such as Figure 1-2 As shown, an active noise control system 10 includes:

[0067] Environmental noise collection device 1, a high-speed analog-to-digital conversion device 2 electrically connected to the environmental noise collection device 1, a playback audio receiving device 3, a signal processing device 4 electrically connected to the high-speed analog-to-digital conversion device 2 and the playback audio reception device 3, respectively, A high-speed digital-to-analog conversion device 5 electrically connected to the signal processing device 4, a power amplification device 6 electrically connected to the high-speed digital-to-analog conversion device 5, and a receiver 7 electrically connected to the power amplification device 6, wherein,

[0068] Signal processing device 4 comprises:

[0069] The environmental noise digital signal input t...

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PUM

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Abstract

The invention provides an active noise control system, which comprises an environmental noise acquisition device, a high-speed analog-to-digital conversion device, a playback audio receiving device, a signal processing device, a high-speed digital-to-analog conversion device, a power amplifying device and a telephone receiver, wherein the signal processing device is electrically connected with the high-speed analog-to-digital conversion device and the playback audio receiving device, and the telephone receiver is electrically connected onto the power amplifying device. The signal processing device comprises an environmental noise digital signal input end, a playback audio digital signal input end, an air noise signal filtering module, an antiphase filter module based on a secondary acoustic feedback channel, a playback audio gain control adjusting module, a frequency response compensating module based on a secondary channel, a coefficient storage module, a signal superposition module and a mixed audio digital signal output end, wherein the environmental noise digital signal input end is used for receiving noise digital signals of an air noise environment. Compared with the prior art, the active noise control system is more effective in noise elimination.

Description

【Technical field】 [0001] The invention relates to an active noise control system and a design method thereof, in particular to an active noise control system and a design method thereof used in the field of portable communication products such as mobile phones. 【Background technique】 [0002] With the development of wireless communication, there are more and more mobile phone users around the world. The requirements of users for mobile phones are not only satisfied with calls, but also to be able to provide high-quality call effects. Especially the current development of mobile multimedia technology, the mobile phone Call quality is even more important. [0003] Due to the existence of a large amount of environmental noise, the signal-to-noise ratio of receivers of communication equipment such as mobile phones is generally not high enough when playing voice. Especially in high-noise environments such as street cars, it is necessary to increase the volume to make local mobile...

Claims

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Application Information

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IPC IPC(8): G10K11/16H04M1/19
Inventor 冯声振王超
Owner AAC TECH PTE LTD
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