Engineering Picture         Sinopec Zhongyuan Petrochemical Co., Ltd. is located at Shengli West Road, Puyang City, Henan Province. It is a large petrochemical enterprise. There are many centrifugal air compressors in the enterprise, and the noise sound pressure level exceeds 100dBA, which seriously interferes with the normal work of workers. In August 2019, the company organized professionals to analyze the noise source and took targeted measures. The project was completed at the end of the same year, and the governance effect reached the expected effect.