Noises of Elevators are Under Standard and Specification

　　The over-loud noises,which could be caused by inferior walls, floors, partition, elevator components and poor measures against noises, are undesirable disturbance to emotions, work and normal life. And thus some regulations are carried out to take down the noises of elevator equipment. The regulations says that the noise from the main machine room should be under 80 dB while the elevator cabin under 55 dB. According to the architectural design criteria, noises are to under 50dB in the day and 40 in the night. Moreover, the environment protection prohibits the noises louder than 40 dB in daytime and 30 dB at night.