Noise monitoring method and system based on sound source identification

Abstract

The invention provides a noise monitoring method and system based on sound source identification. The method comprises the steps of: S1, collecting environmental sound by a sound collection apparatus;S2, calculating data, such as acoustics and psychoacoustics, of the collected environmental sound by using noise analysis software and a computer control front end and sending the data to a sound source analysis module; S3, based on a sound source neural network model and a noise level classification module in the sound source analysis module, judging the noise level of different noise sources and calculating a noise correction value according to the noise level results; S4, adding the noise correction value and an environmental sound level measurement value to finally obtain a noise sound level; S5, sending the noise sound level back to a terminal control system. The method and the system can reflect the noise sound level and take into consideration the subjective feeling differences caused by different sound sources, thereby being capable of truly reflecting the actual status of noise and solving the problem of inaccurate noise monitoring.

Description

technical field [0001] The invention relates to a noise monitoring method, in particular to a noise monitoring method and system based on sound source identification. Background technique [0002] Noise monitoring is the basic condition to solve urban noise pollution. The noise monitoring technology currently used in my country is based on the "Technical Specifications for Environmental Noise Monitoring, Routine Monitoring of Urban Acoustic Environment" (HJ 640-2012) issued by the Ministry of Environmental Protection in 2012. According to this technology The main indicators for standardized monitoring include the equivalent continuous A sound level Leq, cumulative percentage sound levels L10, L50, L90, Lmax, Lmin and standard deviation (SD) measured at each monitoring point for 10 minutes. The monitoring time is the normal working hours during the daytime, and it is monitored once a year. From the perspective of monitoring methods and indicators, the current noise monitoring...

AI Technical Summary

Problems solved by technology

However, with the development of cities towards green and ecology, more and more natural sounds and living sounds that people like to hear and see appear in cities. The equivalent continuous A sound level Leq is used as the noise level monitoring method without distinguishing between different sound source bands. It is especially unsuitable for the situation where there are many ecological sounds in the eco-urban environment

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