restaurants with different styles to provide guests with a unique dining experience. It is the first Ritz-Carlton hotel in northwestern my country, further enhancing the luxury service standard of Xi'an hotel industry. The podium of The Ritz-Carlton, Xi'an is equipped with 4 sets of BAC counter-flow cooling towers, air-conditioning room and intake and exhaust fan ports. The equipment noise value of a single cooling tower during normal operation is about 70dB, and the noise of multiple groups of cooling towers running at the same time can reach 80-85dB after the noise is superimposed. Noise is transmitted to surrounding areas such as residential quarters, open-air bars, office entertainment and other surrounding areas through air, cooling tower foundations and other media. In order to improve environmental health and comfort, the NCC Shenzhen project provides integrated services of electromechanical acoustic design, in-depth construction and acceptance general contracting.

 Governance target: no higher than 55dB(A) during daytime, and discharge up to the standard.

 Treatment measures: Equipment shock absorption, ventilation and noise reduction, and sound absorption and sound barriers.