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Active noise reduction device

A technology of active noise reduction and vibration source, applied in the field of noise reduction, it can solve the problems of high proportion of medium and low frequency noise, inability to effectively isolate the noise of medium and low frequency, and achieve the reduction of the level of medium and low frequency noise, good environmental integration, and ease of use. The effect of installation

Pending Publication Date: 2019-10-18
南京梦声科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to reduce noise pollution, some traditional passive noise reduction technologies such as sound insulation glass and insulating glass are widely used. Passive noise reduction technology is very effective for high-frequency noise isolation, but it cannot effectively isolate low-frequency noise. Common traffic noise, The proportion of low- and medium-frequency noise such as living noise is very high

Method used

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Effect test

Embodiment 1

[0044] As shown in the drawings, an active noise reduction device includes: a device body 1; a fixing unit 6 for connecting a vibration source 7; a vibration detection unit 5 for detecting vibration signals of the vibration source 7; The noise algorithm processes the vibration signal to generate the active noise reduction processing unit of the denoising signal; is used to generate the vibration generating unit 4 that cancels the vibration signal of the vibration source 7 according to the denoising signal; the vibration detection unit 5 is electrically connected to the active noise reduction processing unit The active noise reduction processing unit is electrically connected to the vibration generating unit 4; the active noise reduction processing unit is set on the circuit board 3, and the circuit board 3 also includes a power supply unit.

[0045] A specific embodiment of the present invention is that the vibration detection unit 5 is a laser non-contact vibration measurement...

Embodiment 2

[0056] The active noise reduction device is applied to the noise reduction treatment of low and medium frequency noise, such as being installed on the glass in the room, on the casing of the range hood, etc.

Embodiment 3

[0058] An active noise reduction method comprises placing the above-mentioned active noise reduction device on a vibration source, and turning on the active noise reduction device for noise reduction.

[0059] The principle of this application: the whole device is closely attached to the vibration source 7 such as glass surface through the fixing unit 6 and the rubber surface, the giant magnetostrictive material actuator is fastened to the glass through the fixing unit 6, the power supply unit and the active noise reduction The processing unit is integrated on a circuit board 3, and the circuit board 3 is connected with the giant magnetostrictive material actuator and the laser vibration measurement unit, and the laser non-contact vibration measurement unit is arranged near the side of the giant magnetostrictive material actuator. Do not come into contact with glass. The external noise is transmitted to the glass to cause the glass to vibrate. The laser non-contact vibration m...

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Abstract

The invention relates to an active noise reduction device. The active noise reduction device comprises a device body, a fixed unit used for being connected with a vibration source, and a vibration detection unit used for detecting vibration signals of the vibration source; The active noise reduction device further comprises an active noise reduction processing unit used for processing the vibration signals of the vibration source and generating a denoised signal by adopting an active noise reduction algorithm, and a vibration generation unit used for generating a counteracted vibration sourcevibration signal according to the denoised signal; the vibration detection unit is electrically connected with the active noise reduction processing unit; the active noise reduction processing unit iselectrically connected with the vibration generation unit; and the active noise reduction processing unit is arranged on a circuit board, and the circuit board further comprises a power supply unit.The active noise reduction device is high in portability, easy to install, convenient to operate, capable of being used without special construction for rooms, and high in environmental integration degree.

Description

technical field [0001] The present invention relates to the technical field of noise reduction, in particular to an active noise reduction device. Background technique [0002] In modern urban life, noise pollution can be seen everywhere in various living and production facilities, motor vehicles, and construction. of permanent damage. As one of the important pollutions in today's society, noise pollution has long accounted for more than 40% of environmental complaints. [0003] In order to reduce noise pollution, some traditional passive noise reduction technologies such as sound insulation glass and insulating glass are widely used. Passive noise reduction technology is very effective for high-frequency noise isolation, but it cannot effectively isolate low-frequency noise. Common traffic noise, The proportion of low- and medium-frequency noise such as living noise is very high. Active noise reduction technology is very effective in isolating and reducing mid- and low-f...

Claims

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Application Information

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IPC IPC(8): G10K11/178
CPCG10K11/178G10K11/17821G10K11/17853G10K11/17875
Inventor 李建
Owner 南京梦声科技有限公司