Research On Noise Reduction And Sound Insulation Technology In Green Residential Building

As economy develops,people are raising increasingly demanding requirements about the quality of residential housing,which has transformed from previous rapid expansion to present high-quality development.In this context,indoor acoustic environment has become an important aspect in evaluations of a good built environment.Although the existing standards have put forward corresponding specifications and control requirements for residential noise,the quality of indoor acoustic environment close to noise sources is still a problem that is yet to be effectively solved.Due to the complexity and irregularity of noise sources,targeting the scenarios where the noise sources and transmission channels have been controlled,the author conducted an investigation to study on the current situation of indoor acoustic environment in Suzhou’s residential buildings.Survey questionnaires were distributed to residents to obtain their subjective evaluations.At the same time,acoustic instruments were used to measure the sound insulation of the exterior enclosure structure of the residences close to the specific noise sources.The actual measurement content included three aspects(the measurement of the indoor 24-hour noise value,the spectral characteristics of the indoor noise,and the indoor noise measurement with the door and windows opened and closed)of the measured residential area.With respect to measurement of the impact sound insulation,the author conducted on-site impact sound insulation experiments on different types of floor slabs in three different residences.Then an objective evaluation and analysis of the current situation of residential indoor noise was made according to the Evaluation Standard for Green Building(GB/T 50378-2019).In the chapter about software simulation,the author simulated the sound insulation of windows,walls and floors,and optimized the acoustic environment of residences that failed to meet the standards based on the actual measurement content,so that the indoor noise value could be reduced to the permitted range.Finally,based on the above research and regulative guidelines,the author proposed an acoustic environment optimization strategy for residences close to specific noise sources from three aspects including construction planning,single building design,and building structure.