Precautions when using a sound level meter to monitor traffic noise on the road
As long as you choose a suitable sound level meter, according to the detection standard, you can get the noise value that meets the standard.
1. The measurement should be carried out under the weather conditions of no rain and no snow, and stop the measurement when the wind speed reaches 5 m/s or more. The microphone is equipped with a windshield during measurement.
2. Select a certain traffic artery as the measurement road section, and the measurement point is selected on the sidewalk beside the road between two intersections;
20 cm from the edge of the roadway, the distance from the intersection here should be greater than 50 m. Arrange 5 measuring points on the measuring road section and draw the measuring point layout diagram.
3. Use a sound level calibrator to calibrate the measuring instrument, and the deviation should not be greater than 0.5dB.
4. Continuously measure traffic noise for 20 minutes, and use 2 counters to record the number of large vehicles and small vehicles respectively.
5. Repeat the above measurements at 5 different measuring points on the same road section.
Application introduction of sound level meter
The sound level meter is the most basic instrument in measuring noise. It belongs to an electronic instrument. The sound level meter is generally composed of a condenser microphone, a preamplifier, an attenuator, an amplifier, a frequency weighting network, and an effective value indicating meter. According to the sensitivity of the sound level meter, it can be divided into two categories, one is the ordinary sound level meter; the other is the precision sound level meter, and it can also be divided into two types according to the purpose of the sound level meter: one is used to measure steady state noise; the other is used to measure unsteady state noise and impulse noise.
The sound level meter adopts advanced digital detection technology, which greatly improves the stability and reliability of the instrument. The sound level meter has the advantages of simple operation and convenient use; it has the characteristics of large dynamic range of measurement range, large-screen LCD digital display, automatic measurement and storage of various data, etc.
The sound level meter can be widely used in industrial noise measurement and environmental noise measurement of various machines, vehicles, ships, electrical appliances, etc.
