Array detection and estimation method of environmental noise field intensity and distribution

Abstract

The invention provides an array detection and estimation method of environmental noise field intensity and distribution. According to the method, an electret microphone is arranged in an array mode, packaging of the specific structure and the specific materials is adopted by the array of the electret microphone to form a ball coronary sound sensor array, each electret microphone sound hole corresponds to through holes in a packaging outer shell, and multi-hole metal composite structural material interval fillings is adopted by the through holes in the packaging outer shell. Each electret microphone signal of the not-filled through holes in the packaging outer shell and each electret microphone signal adjacent to the electret microphone after the through holes in the packaging outer shell are filled are collected according to itineration and synchronization modes, power spectrum estimation is carried out on noise intensity after low-frequency background noise is restrained, and finally an environmental noise field intensity and distribution model is built. The technical problems that when high-frequency noise is measured, the sensitivity is low, and noise distribution and field intensity are hard to determine are solved.

Description

technical field [0001] The invention relates to an environmental noise field detection and evaluation method, in particular to an array type detection and estimation method for the environmental noise field intensity and distribution, and belongs to the technical field of environmental monitoring and environmental protection. Background technique [0002] Noise pollution is the fourth largest environmental hazard after air pollution, water pollution and solid waste pollution. The number of complaints caused by it has always ranked first among all kinds of environmental pollution complaints, seriously threatening people's normal work, life and health The implementation of environmental noise detection is the basic requirement for grasping the status quo of noise pollution and carrying out scientific and effective control of environmental noise. With the rapid development of the country's economic construction, people are paying more and more attention to the problem of enviro...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the technical defects of low sensitivity and difficulty in determining noise distribution and field strength in the prior art when measuring high-frequency noise, the present invention provides an array detection and estimation method for environmental noise field strength and distribution. The electret microphone is set, and the electret microphone array is encapsulated with a specific structure and special material to form a spherical crown sound sensor array; each electret microphone sound hole corresponds to the through hole on the encapsulation shell, and the encapsulation The through-holes on the envelope are filled with porous metal composite structure material at intervals; each electret microphone signal connected to the unfilled through-hole on the envelope and the surrounding electret microphone adjacent to the electret microphone are collected in a roving and synchronous manner. The electret microphone signal after filling the through hole on the sealing shell is used to estimate the power spectrum of the noise intensity after the low-frequency background noise is suppressed, and finally establish the environmental noise field intensity and distribution model; it solves the problem of low sensitivity and difficulty in measuring high-frequency noise Technical issues in determining noise distribution and field strength

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