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Self-adaption noise reduction device for low frequency noise in indoor environment

A low-frequency noise, indoor environment technology, applied in the direction of instruments, sounding equipment, etc., can solve problems such as low-frequency noise pollution, and achieve the effect of reducing low-frequency noise, improving the quality of life, and making low-cost manufacturing.

Inactive Publication Date: 2013-12-11
云南省科学技术情报研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies of the prior art, to provide an adaptive noise reducer capable of effectively reducing low-frequency noise in indoor environments, and to solve the problem of low-frequency noise pollution in the home environment at a low cost

Method used

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  • Self-adaption noise reduction device for low frequency noise in indoor environment

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Embodiment 1

[0037] Explanation of terms:

[0038] A / D (analog to digital converter) is a circuit that converts analog signals into digital signals, called analog-to-digital converters, or A / D converters for short.

[0039] D / A (digital to analog converter) is a circuit that converts digital signals into analog signals, called digital-to-analog converters, or D / A converters for short.

[0040] CPLD (Complex Programmable Logic Device) is a digital integrated circuit in which users can construct logic functions according to their own needs. The abbreviation of Complex PLD is a more complex logic element than PLD.

[0041] MCU (Micro Controller Unit) is an integrated circuit chip. It uses VLSI technology to integrate a central processing unit with data processing capabilities, random access memory, various input / output interfaces and interrupt systems into a small silicon chip. And perfect computer system.

[0042] JTAG (Joint Test Action Group; Joint Test Action Group) is an international ...

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Abstract

The invention discloses a self-adaption noise reduction device for low frequency noise in an indoor environment. The self-adaption noise reduction device for low frequency noise in the indoor environment comprises a primary microphone, an inverse sound source, a frequency adjusting device and a secondary microphone. The secondary microphone is a high-sensitivity omnidirectional electret secondary microphone with the response frequency ranging from 20Hz to 20KHz. The primary microphone and the secondary microphone are connected through an audio cable and a 16-bit analog-to-digital converter respectively. The 16-bit analog-to-digital converter is connected with an I / O read-write parallel interface of the frequency adjusting device through a 16-pin parallel interface bus. The reverse sound source is connected with an MCU processor of the frequency adjusting device through a serial analog-to-digital converter. The self-adaption noise reduction device for low frequency noise in the indoor environment is particularly suitable for low frequency noise processing in a household environment, low frequency noise emitted by indoor electronic devices and electrical devices can be obviously reduced, the living environment is improved, and the living quality is improved. The self-adaption noise reduction device for low frequency noise in the indoor environment is small in size, capable of being used once a system is powered, free of a complex installation process, low in manufacturing cost and capable of being completely purchased and deployed by general users.

Description

technical field [0001] The invention belongs to the technical field of electronic active noise reduction, and in particular relates to an adaptive noise reducer which has a significant noise reduction effect for low-frequency noise in an indoor environment. Background technique [0002] Low-frequency noise pollution has become a major public hazard in the urban environment. Scientific research shows that low-frequency noise can damage health. People work for a long time and live in low-frequency noise environment, which can greatly stimulate the central nervous system, and in severe cases, it can lead to central nervous system dysfunction. In addition, low-frequency noise can cause symptoms such as poor sleep, inattention, and memory loss, which can lead to upset mood, emotional instability, reduced tolerance, bad temper, and even a series of diseases such as high blood pressure, ulcers, and diabetes. Because low-frequency noise causes sensorineural damage and hair cell dam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/178
Inventor 吴斌马继涛邬平诸开梅张红霞李鑫黄红伟谭鹏杜军李俊邓艺刘薇卢泓洲安道渊
Owner 云南省科学技术情报研究院
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