Modelling the microscopic structure of the sound-absorbing foam and examination of sound-absorption characteristics

In recent year, the automobile industry has undergone a revolution once in 100 years. New energy vehicles such as electric vehicles and hybrid vehicles have become a trend.A sound absorbing material is attached to the inside of the car body or tires to reduce low frequency noise such as wind noise that has become noticeable due to the electrification of the power source and road noise due to unevenness of the road surface.In this research,we design the microscopic structural of foam materials to improve the sound absorption coefficient in the low frequency band while suppressing the thickness of the foam sound absorbing material.