The Correct Use of Analytical Sound Level Meter
The sound level meter is a basic noise measuring instrument. It is an electronic instrument, but it is different from objective electronic instruments such as voltmeters. When converting an acoustic signal into an electrical signal, it can simulate the time characteristics of the human ear's response speed to sound waves; the frequency characteristics of different sensitivities to high and low frequencies and the intensity characteristics of changing the frequency characteristics at different loudness. A sound level meter is a subjective electronic instrument.
Correct use of sound level meter:
1. Selection of the environment in which the sound level meter is used: 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 sound level 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 sound level meter, take out the sound level meter, and put on the sensor.
4. Put the sound level meter in state A, check the battery, and then calibrate the sound level 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 the equipment and put it back to the designated place.
