Spectrum Adaptation Terms Of Airborne Sound Insulation When High-Speed Railway Noise Treated As Noise Sources

China has become the country with the most complete high-speed railway system technology,the strongest integration capability,the longest operating mileage,the highest operating speed,and the largest scale of construction in the world.The development of high-speed railways has promoted the growth of China's economy,but the noise generated by high-speed railways has increasingly affected the residents live along the route.High-speed rail noise has become an unavoidable problem in the development of China's high-speed railway.Existing evaluation methods for airborne sound insulation properties of building components take into account the spectral corrections of pink noise and traffic noise.However,the noise spectrum generated by high-speed trains is different from that of ordinary low-speed ordinary wheel-rail railway trains.Using the existing spectrum corrections to correct the airborne sound insulation of building components may cause errors.Therefore,it is helpful to discuss the amount of spectrum correction for airborne sound insulation evaluation of high-speed rail traffic,which is helpful for guiding the sound insulation design of buildings along the high-speed rail,reducing high-speed rail noise pollution,and creating a healthy living environment.In this paper,through calculation and analysis,a correction curve for airborne sound insulation evaluation spectrum suitable for high-speed rail traffic noise is established.Through laboratory measurements and subjective listening evaluation,the applicability of the spectrum correction curve in common building envelopes was verified.Firstly,the representative average high-speed rail traffic noise normalized spectrum and the airborne sound insulation spectrum correction curve for building components suitable for high-speed rail traffic noise are obtained by A-weighting and normalizing the high-speed railway traffic noise spectrum.The spectrum data is brought into 28 common partition walls for analysis and calculation,and the spectrum correction amount Cg of the common building partition walls is obtained.Then,verify the applicability of the spectrum correction curve in the airborne sound insulation laboratory.According to the relevant standards of sound insulation,the performance of the air sound insulation experimental measurement system is checked.Use the steady-state noise with daily activity noise,urban traffic noise and high-speed rail traffic noise spectrum as the sound source signal to measure the sound insulation characteristics of commonly used building envelopes.he measurement results show that the high-speed rail traffic noise spectrum correction curve is suitable for the calculation of the spectral correction of the airborne sound insulation evaluation of the high-speed rail traffic noise by the commonly used building envelopes.Finally,subjective evaluation experiments were conducted through laboratory recording and playback of listening sounds.Adopt grade scoring method and paired comparison method to organize personnel to evaluate the sound materials of sound insulation of walls recorded in the laboratory.The evaluation results show that the correction amount of the high-speed rail traffic noise spectrum has a certain correlation with the subjective experience.