Noise standard for residential areas in mingguang city.

According to the Quality Standard for Acoustic Environment (GB3096-2008), 1 Class acoustic environmental functional zone refers to an area whose main functions are residence, medical and health care, culture and education, scientific research and design, and administrative office, which needs to be kept quiet. Noise limit [dB (A)] daytime 55; 45 p.m.

How to confirm whether the noise exceeds the national noise monitoring standard? Only by monitoring and comparing with the standard provisions can we determine whether it exceeds the national standard.

The standard stipulates that:

Monitoring requires measuring instruments. The accuracy of measuring instruments is Class 2 or above, and the comprehensive average sound level meter or automatic environmental noise monitoring instrument shall meet the requirements of GB3785 and GB/T 17 18 1, and shall be verified regularly. Before and after measurement, the indication deviation of measuring instruments calibrated by acoustic calibrator shall not be greater than 0.5 dB, otherwise the measurement will be invalid. The acoustic calibrator shall meet the requirements of GB/T 15 173 for 1 or 2 acoustic calibrators. When measuring, the microphone should be equipped with a windshield. Selection of measuring point According to the monitoring object and purpose, the following three measuring point conditions (referring to the position where the microphone is placed) can be selected to measure the environmental noise: a) Generally, the outdoor distance from any reflector (except the ground) is at least 3 .5 m, and the height from the ground 1. 2 meters .. If necessary, it can be placed on a high-rise building to expand the scope of sound monitoring. When monitoring the vehicle, the microphone should be fixed at the height of 1 .2 m on the top of the vehicle. B) noise-sensitive structures is located outside the outdoor noise-sensitive structures, with a distance of 1 m from the wall or window and a height of more than 1 .2 m from the ground. C) The indoor space in noise-sensitive structures is at least 1 m away from walls and other reflecting surfaces, about 1 .5 m away from windows and 1.2 ~ 1.5 m away from the ground. Meteorological conditions should be measured when there is no rain, no snow, no lightning and the wind speed is lower than 5 m/s. Types and methods According to the monitoring object and purpose, environmental noise monitoring can be divided into two types: acoustic environmental function area monitoring and noise-sensitive structures monitoring, and the monitoring methods specified in Appendix B and Appendix C are adopted respectively. Measurement records The measurement records shall include the following items: a) date, time, place and surveyor; B) Model and serial number of the instrument used and its calibration records; C) Determine meteorological conditions (wind direction, wind speed, rain and snow, etc.). ) within the time; D) measurement items and results; E) Standards on which the measurement is based; F) Schematic diagram of measuring points; G) description of sound source and operating conditions (such as traffic volume measured by traffic noise, etc.). ); H) Other items that should be recorded.

Hope to adopt, thank you.