1. Measurement Conditions
The measurement of meteorological conditions should be carried out in a climate without rain and snow, and the measurement should be stopped when the wind force is above 5.5m/s
2 Measurement time
The measurement should be carried out during the normal working hours of the enterprise under test. It is divided into two parts: day and night, and the division of time periods can be determined by the local people's government according to local habits and seasons.
3. Sampling method
1> When sampling with a sound level meter, the dynamic characteristics of the instrument are "slow" response, and the sampling time interval is 5s.
2> When sampling with an environmental noise automatic monitor, the dynamic characteristics of the instrument are "fast" response, and the sampling time interval is not greater than 1s
Measured value 2.5.1 Equivalent sound level of steady state noise measurement for 1 min.
