An environmental noise filtering method and device for mobile phone

A technology of environmental noise, mobile phone, applied in the direction of selection device, structure of telephone set, electrical components

Inactive Publication Date: 2008-02-13
YINGHUADA (SHANGHAI) ELECTRONIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, noise above the threshold will still be transmitted, which does not play a corresponding role

Method used

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  • An environmental noise filtering method and device for mobile phone
  • An environmental noise filtering method and device for mobile phone

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Fig. 1 shows a preferred embodiment of the noise filtering device of the present invention. As shown in FIG. 1 , the noise filtering device 1 includes two microphones and a differential amplifier circuit 12 connected thereto. Wherein the microphone 10 for picking up the human voice is placed at a position relatively close to the caller to receive the caller's voice, and the signal actually received is the superposition of the pure call sound signal and the ambient noise signal, that is, the call that includes the ambient noise sound. The microphone 11 for picking up noise is placed far away from the speaking voice to receive the noise of the surrounding environment, such as being placed on the back of the mobile phone or the back of the receiver of the mobile phone, etc., depending on the specific structure. The differential amplifying circuit ...

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Abstract

The invention discloses an environmental noise filtration method and device. The invention can largely weaken the effect of outside noise on speaking voice and greatly improves communication quality. An art scheme of the invention is that the method and device collect the environmental noise through a first pickup equipment, collect the communication voice including the environmental noise through a second pickup equipment, connect the differential amplification circuits of the first and the second pickup equipments through a connection, and output the difference of the environmental noise signal and the communication voice signal after the amplification. The invention can be applied to all speaking systems, which utilize a microphone.

Description

technical field [0001] The invention relates to an environmental noise filtering method and device, in particular to a method and device for solving the influence of external environmental noise on the quality of mobile phone calls. Background technique [0002] Usually, when the communicator makes a call, the voice of the communicator and the noise of the surrounding environment all pass to the microphone of the mobile phone and pass to the ear of the receiver. If the ambient noise is small, the impact on the call quality will not be great. If there is a noisy crowd or a rumbling locomotive passing by, it will be difficult for the receiver to hear the voice of the communicator. [0003] The existing method is to set a sound threshold, and the sound will be transmitted only when the sound is greater than the threshold value. If the noise is small and does not exceed the threshold, this approach is valid and the noise is not transmitted. However, noise above the threshold ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/19H04Q7/32H04R3/00
Inventor 夏涛何代水
Owner YINGHUADA (SHANGHAI) ELECTRONIC CO LTD
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