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Four-channel acoustic automatic filtering device

A filtering device, four-channel technology, applied in the direction of frequency response correction, etc., can solve the problem of lack of denoising performance, etc., and achieve the effect of removing sound dead angle and good filtering.

Inactive Publication Date: 2017-08-11
AEROSPACE HI TECH HLDG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is to solve the existing problem of lack of devices with good denoising performance, and now provides a four-channel acoustic automatic filter device

Method used

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  • Four-channel acoustic automatic filtering device
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  • Four-channel acoustic automatic filtering device

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Experimental program
Comparison scheme
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specific Embodiment approach 1

[0018] Specific implementation mode one: refer to figure 1 and Figure 5 Specifically illustrate this embodiment, the four-channel acoustic automatic filter device described in this embodiment, it comprises four sound collection microphones and processor,

[0019] The four sound collection microphones are evenly arranged in a circular shape, and each sound collection microphone is provided with a sound collection circuit and an operational amplifier.

[0020] The sound acquisition signal output end of each sound acquisition circuit is connected to the sound acquisition signal input end of the operational amplifier, and the signal amplification output ends of the four operational amplifiers are respectively connected to four A / D channel input ends of the processor,

[0021] The processor is used to collect the data of four A / D channels at the same time and cache them. The data collected by the four channels are 4 kinds of amplitude data, and the data with the largest amplitude...

specific Embodiment approach 2

[0023] Embodiment 2: This embodiment is a further description of the four-channel acoustic automatic filter device described in Embodiment 1. In this embodiment, the sound collection circuit is realized by a chip modeled as MB96F386.

specific Embodiment approach 3

[0024] Specific embodiment three: This embodiment is a further description of the four-channel acoustic automatic filter device described in specific embodiment one. In this embodiment, the processor collects data from four A / D channels at the same time, and buffers the data for 200 milliseconds. After the data, start processing the data.

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Abstract

A four-channel acoustic automatic filtering device relates to the field of clutter filtering. The invention aims to solve the problem that devices with good de-noising performance are lacked in the prior art. Four sound collection microphones are evenly distributed in a circular shape. Each sound collection microphone is equipped with a sound acquisition circuit and an operational amplifier. A sound acquisition signal output terminal of each sound collection circuit is connected to a sound acquisition signal input terminal of the operational amplifier. Signal amplifying output terminals of the four operational amplifiers are connected to four A / D channel input terminals of a processor. The processor is used for simultaneously collecting data of four A / D channels and buffering the data. The data collected through the four A / D channels are four types of amplitude data. The difference between the data of the maximum amplitude and the data of the minimum amplitude is calculated, and then the obtained difference and the other two types of amplitude data are used to calculate an average, thereby filtering out the ambient noise, and a sound waveform with no noise interference completely is output. The device is used for de-noising.

Description

technical field [0001] The invention relates to a four-channel acoustic automatic filtering device, which belongs to the field of clutter filtering. Background technique [0002] The existing sound collection adopts ordinary microphone input, and there will always be a lot of background sound input in noisy situations. At this time, the sound to be collected is mixed with the background sound, and the listener will not be able to hear clearly when playing, or it is difficult to distinguish the desired sound. Listen to the sound. [0003] In the prior art, there are denoising methods, but the denoising performance is poor. [0004] Based on the above reasons, the defect in the prior art is that there is a lack of devices with good denoising performance. Contents of the invention [0005] The present invention aims to solve the problem of lack of devices with good denoising performance in the prior art, and now provides a four-channel acoustic automatic filtering device. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/04
CPCH04R3/04
Inventor 胡伟艾延宝金永君张凤璐高伟滕胜广石磊
Owner AEROSPACE HI TECH HLDG GROUP