This standard is formulated for the purposes of enforcing the Environment Protection Law of the People’s Republic of China and Noise Pollution Prevention and Control Law of the People’s Republic of China, and setting standards for the automatic monitoring and assessment of acoustic environment quality in function areas. This standard specifies the monitoring method, main monitoring items, data validity, monitoring data statistics, quality assurance, and quality control specifications. This standard is the original version.

 Technical specifications for automatic monitoring of acoustic environment quality in function area (HJ 906-2017)