4 Factors Affecting Noise Meter
1. From the measurement object, it can be divided into the characteristic measurement of environmental noise (sound field) and the measurement of sound source characteristics.
2. From the time characteristics of the sound source or sound field, it can be divided into steady-state noise measurement and unsteady-state noise measurement. Non-stationary noise can be divided into periodic noise, irregular noise and pulse sound.
3. From the frequency characteristics of the sound source or sound field, it can be divided into broadband noise, narrowband noise and noise containing prominent pure tone components.
4. From the accuracy of measurement requirements, it can be divided into precision measurement, engineering measurement and noise survey.
The specific operation steps of the noise meter
1. Selection of the noise meter’s operating environment: Select a representative test location, and the sound level meter should be kept away from the ground and the wall to reduce the additional impact of the reflected sound from the ground and walls.
2. The weather conditions require that the noise meter should keep the diaphragm of the microphone clean when there is no rain or snow. When the wind force is above level 3, a wind cover must be added (to avoid wind noise interference), and the measurement should be stopped for strong winds above level 5.
3. Open the carrying case of the noise meter, take out the noise meter, and put on the sensor.
4. Put the noise meter in the measurement state, check the battery, and then calibrate the noise meter.
5. Use the comparison table (commonly referred to as environmental sound level) to adjust the measurement range.
6. The following can be used fast (measure the instantaneous value of the environment where the sound pressure level changes greatly), slow (measure the average value in the environment where the sound pressure level does not change much), pulse (measure the pulse sound source), filter ( Measure the sound level of the specified frequency band) Various functions are used for measurement.
7. Record data as needed, and also connect to a printer or other computer terminals for automatic collection. Organize equipment and put it back in the designated place.
