Research On The Acoustical Features And Management Precepts Of Stationary Noise Sources In Residential Areas

The kinds of noise source and its impact mode have changed a lot with the rapid development of cities' modernization. Researches show that social activities have become the most significant sources of noise in many cities in our country instead of transportation network and industry. On the other hand, all sorts of equipments in residential areas have taken the place of people's activities to become the most important social activities noise source. They distribute in the living environment directly and produce the low frequency noise that cause people's annoyance.In this paper, we focus on the stationary noise sources such as underground garage, transformer room, water pump room and air conditioning system etc. The noise feature, distribution, and propagation rules of the noise sources are studied to set up the corresponding noise control technology. Meanwhile, this paper deals with a prediction model for the noise of underground garages in urban residential areas. The computer simulation model of random point sound source is based on acoustical principles and probability theory. Comparison between predicted results and measured value of noise level shows that the predicted model presents an acceptable degree of accuracy. It can provide the reference knowledge for the planning of residential areas.