GB/T 3222.2-2022 Measurement of sound pressure level of environment noise in focused acoustics. As the second part of this series of standards, it is clearly applicable to sound pressure level measurement in different environment noise scenarios, such as urban, rural, industrial areas, etc. Specify in detail the instruments required for measurement, such as the type and accuracy requirements of sound level meters. Describe measurement environmental conditions, covering background noise control, measurement site selection, etc. Standardize the arrangement of measurement points, the determination of measurement time periods, and the data collection and processing methods of sound pressure levels, providing a unified operating specification for the accurate determination of environment noise sound pressure levels, and assisting the monitoring and evaluation of environment noise.