Single noise exposure protective device

Abstract

The invention discloses a single noise exposure protective device which comprises a digital microphone, a demodulation module, a frequency weighting module, a sound intensity calculating module, a noise dose accumulating module and an alarm output module. The digital microphone collects environmental noise and converts the noise collected into digital pulse signals. The demodulation module receives the digital pulse signals transmitted from the digital microphone, demodulates the digital pulse signals and converts the digital pulse signals into noise data. The frequency weighting module receives the noise data transmitted and handles the noise data in a frequency weighting mode. The sound intensity calculating module receives data signals transmitted from the frequency weighting module and obtains noise sound intensity after calculation and process. The noise dose accumulating module receives results of the sound intensity calculating module, conducts time accumulation and calculation for sound intensity in a working time range of the device, obtains total noise dose, and transmits the total noise dose to the alarm output module. The single noise exposure protective device is simple in debugging, stable in properties and suitable for being used by site workers.

Description

technical field [0001] The invention relates to the technical field of noise detection and processing, in particular to an individual noise dose measurement technology, and in particular to an individual noise exposure protection device. Background technique [0002] With the development of industrial production, transportation, and urban construction, as well as the increase of population density and the increase of household facilities (audio, air conditioning, television, etc.), environmental noise is becoming more and more serious, and it has become a major public hazard that pollutes the human social environment. Noise has the characteristics of locality, temporary and multiple. Noise brings physiological and psychological harm to people mainly in the following aspects: ① Interfering with rest and sleep, affecting work efficiency: Interfering with rest and sleep; reducing work efficiency. ② Damage to auditory and visual organs: Strong noise can cause ear discomfort, su...

AI Technical Summary

Problems solved by technology

[0003] At present, the preamplification and frequency weighting of common noise meters or individual noise dosimeters on the market use analog circuits. The discreteness of component parameters has a great impact on circuit indicators, and the workload of circuit debugging and calibration is large.

In addition, the current common personal noise dosimeters focus on the measurement of noise dose. They have many functions and complex operations, and are suitable for trained environmental protection personnel or labor hygiene personnel; Operators, the operation of these instruments is difficult to master, and the output content is not easy to understand, which affects the actual protection effect

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