Analyze the correct use of sound level meters
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 acoustic signals into electrical signals, the time characteristics of the human ear's response speed to sound waves can be simulated; the frequency characteristics with different sensitivities to high and low frequencies, and the intensity characteristics that change the frequency characteristics at different loudnesses. A sound level meter is a subjective electronic instrument.
Proper use of sound level meter:
1. Selection of sound level meter usage environment: 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. Weather conditions require that the sound level 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 sound level meter carrying case, take out the sound level meter, and put on the sensor.
4. Place the sound level meter in A state, test the battery, and then calibrate the sound level 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 the equipment and return it to the designated place.
