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Two-microphone differential noise reduction device of mobile phone

A technology of dual microphones and microphones, applied in the direction of telephone structure, handset/earphone accessories, etc., can solve the problems of communication quality, communication difficulties, and the inability of both parties to hear each other's voice clearly.

Inactive Publication Date: 2011-07-06
NINGBO SHUANGLIN AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As a communication tool, mobile phones have been very popular, almost to the point of having one, but there are still problems in the quality of communication, especially in the environment with a lot of noise, it is often difficult to communicate
For example, in a car or in a shopping mall, the noise makes it impossible for both communication parties to hear each other's voice clearly.

Method used

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  • Two-microphone differential noise reduction device of mobile phone
  • Two-microphone differential noise reduction device of mobile phone
  • Two-microphone differential noise reduction device of mobile phone

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Embodiment Construction

[0012] refer to figure 1 , a mobile phone dual-microphone differential noise reduction device of the present invention includes a first microphone 1, a rear-stage audio amplifier input terminal 2, a second microphone 3, and a differential amplifier 4, and the first microphone 1 passes through a first bias coupling circuit 5 is connected to the non-inverting input terminal of the differential amplifier 4, the second microphone 3 is connected to the inverting input terminal of the differential amplifier 4 through the second bias coupling circuit 6, and the output terminal of the differential amplifier 4 is connected to the post-stage audio amplifier Input 2. The first microphone 1 is arranged on the lower side of the front of the mobile phone, and the second microphone 2 is arranged on the back of the mobile phone.

[0013] In this embodiment, the differential amplifier can also be referred to as a differential amplifier circuit, which is a common technology, and the first bias...

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Abstract

The invention discloses a two-microphone differential noise reduction device of a mobile phone, comprising a first microphone (1), a rear-stage audio amplifier input end (2), a second microphone (3) and a differential amplifier (4). By adopting the technical scheme that a differential amplifying circuit consisting of two microphones is arranged on the mobile phone and used for counterbalancing background noise, the device overcomes the problems and defects of the prior art that the call on the mobile phone is not clear in an environment of strong noise. The two-microphone differential noise reduction device can effectively reduce the interference of environmental noise in the call on the mobile phone in the environment of strong noise, thus achieving the aim that both communicating parties can hear each other clearly.

Description

technical field [0001] The invention relates to a mobile phone, in particular to a mobile phone dual-microphone differential noise reduction device for reducing the interference of environmental noise on both mobile phone communication parties. Background technique [0002] As a communication tool, mobile phones have become very popular, almost to the extent that everyone has one, but there are still problems in the quality of communication, especially in environments with a lot of noise. For example, in a car or in a shopping mall, the noise prevents both communicating parties from hearing each other's voice clearly. Contents of the invention [0003] Aiming at the problems and deficiencies in the above-mentioned prior art, the present invention adopts the technical scheme of setting a differential amplifier circuit composed of two microphones on the mobile phone, and canceling the background noise through the differential amplifier circuit, and provides a dual-microphone...

Claims

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Application Information

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IPC IPC(8): H04M1/19H04R1/10
Inventor 杜林新
Owner NINGBO SHUANGLIN AUTO PARTS
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