Environment noise tester

Abstract

The invention discloses an environmental noise tester, which is characterized in that it includes a microphone for noise, an amplifier for amplifying noise signals, a V / F conversion circuit for converting voltage value noise signals into frequency value noise signals, The single-chip microcomputer for analyzing and processing the noise signal and the LCD display module for displaying the noise test result, the microphone, the amplifier, the V / F conversion circuit, the single-chip microcomputer and the LCD display module are connected in sequence. The invention takes 89C52 single-chip microcomputer as the core and adopts V / F conversion technology to form a low-cost, portable digital display environmental noise measuring instrument. The instrument works stably and has good performance. After calibration and calibration, it can meet the needs of general civilian use. It can be widely used in industrial and mining enterprises, institutions, schools and other occasions that need to measure and control environmental noise.

Description

technical field [0001] The invention relates to the technical field of test instruments, in particular to an environmental noise tester. Background technique [0002] Noise is noise, which is a kind of sound that causes irritability or is too loud and endangers human health. Noise usually refers to those unpleasant, annoying sounds. The waveform of the noise is chaotic. From the perspective of environmental protection, all sounds that affect people's normal study, work and rest, and all "unwanted sounds" that people have on certain occasions are collectively referred to as noise. Such as the roar of machines, the sound of motors and whistles of various vehicles, the noise of people and various sudden sounds, etc., are all called noise. Noise pollution is a sensory public hazard, which is related to people's subjective wishes and people's living conditions, so it has different characteristics from other public hazards. [0003] Noise pollution mainly comes from transporta...

AI Technical Summary

Problems solved by technology

However, most of the domestic portable noise testers are expensive imported special equipment, which cannot be popularized as civilian products except those owned by environmental protection departments such as sanitation and metering.

Images