Full-digital real-time noise measurement and analysis method and system thereof

Abstract

The invention discloses a full-digital real-time noise measurement and analysis method and a system thereof. The noise measurement and analysis system provided with a noise measurement and analysis software PDA is connected with a noise collection system by a USB port. The method and system realize the digitization of frequency weighting, time weighting, octave and 1 / 3 octave processing, and can display time domain waveform and frequency domain waveform and provide system settings; and a user can select settings of sampling frequency and sampling time of the noise collection system, select L linearity, A and C types of frequency weighting and select time average, fast gear and slow gear of time weighting. In a graphic display mode, the user selects a frequency domain analysis method of signals and displays a corresponding frequency spectrogram according to needs, wherein the functions of FFT frequency spectrogram analysis, octave frequency spectrum analysis, 1 / 3 octave frequency spectrogram analysis and the like realize the measurement and analysis to real-time noise. The method and system utilize a PDA computer system to realize the full-digital real-time noise signal measurement and analysis with low cost and high quality.

Description

technical field [0001] The invention relates to an all-digital real-time noise measurement and analysis method and a system thereof. Background technique [0002] Noise, also known as atonal sound, is a sound that makes people feel uncomfortable and disturbs people's normal life and work. From a physical point of view, it is an irregular and chaotic combination of sounds of different frequencies and different intensities. From a physiological point of view, all annoying, disturbing and unnecessary sounds are called noise. Therefore, noise is sometimes not only defined by physical quantities alone, but also related to people's psychological and physiological states. According to the nature of the noise, it can be divided into various noise sources such as traffic noise, industrial noise, construction noise, and domestic noise. Noise pollution affects people's normal work, rest, and physical and mental health, and has become one of the main pollution sources of the contempo...

AI Technical Summary

Problems solved by technology

[0005] However, domestic noise control technology research started relatively late, and there is a big gap compared with developed countries, especially in computer technology for noise measurement and product optimization design.

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