Teach you how to choose a high-quality noise meter in 1 minute
Noise meters are used for sound level measurement in the environment, machinery, traffic, ships and other noises; decibel meters are mainly classified into the following categories:
1. Noise meters can be divided into precision measurement, engineering measurement and noise census according to the accuracy of measurement requirements.
2. Noise meters can be divided into steady-state noise measurement and unsteady-state noise measurement based on the time characteristics of the sound source or sound field. Unsteady noise can be divided into periodic changing noise, irregular changing noise and impulse sound.
3. Based on the frequency characteristics of the sound source or sound field, the noise meter can be divided into broadband noise, narrowband noise and noise containing prominent pure tone components.
4. Noise meters can be divided into precision measurement, engineering measurement and noise census according to the accuracy of measurement requirements.
Specific operating steps of the noise meter
Whether the noise meter is used correctly or not directly affects the accuracy of the measurement results. Therefore, it is necessary to introduce the use of noise meters.
1. Selection of the environment in which the noise meter is used: Choose a representative testing location. The sound level meter should be away from the ground and away from the wall to reduce the additional impact of reflected sound from the ground and walls.
2. The weather conditions require that the noise meter should keep the microphone diaphragm clean when there is no rain or snow. A wind cover must be installed when the wind is above Level 3 (to avoid wind noise interference). Measurement should be stopped for strong winds above Level 5.
3. Open the noise meter carrying case, take out the noise meter, and put on the sensor.
4. Put the noise meter into measurement mode, test the battery, and then calibrate the noise meter.
5. Comparison table (reference for common ambient sound levels) to adjust the measurement range.
6. Next, you can use fast (measure the instantaneous value in an environment where the sound pressure level changes greatly), slow (measure the average value in an environment where the sound pressure level does not change greatly), pulse (measure the pulse sound source), filter ( Measure the sound level of a specified frequency band) various functions for measurement.
7. Record data as needed, and you can also connect to a printer or other computer terminal for automatic collection. Organize equipment and return it to designated place.
