introduction: A large number of industrial exhaust fans are installed on the roof of Atlantis Commercial Street in Sanya, and a large amount of noise is generated during the operation of the fans to interfere with neighboring hotel customers. In order to completely solve the problem of excessive noise emission, the NCC Shenzhen team is responsible for Star Real Estate) provides on-site inspection, acoustic simulation, scheme design and project construction acceptance services. The project adopts corresponding sound insulation and noise reduction products for different test situations. Finally, it successfully passed the professional acceptance of the customer and Shanghai Difei Acoustic Consultant.