STUDY ON THE SOUND ABSORPTION PERFORMANCE OF ULTRA-MICROPOROUS HONEYCOMB ALUMINUM PANELS

Abstract

In order to reduce the impact of intensive noise on personnel comfort in multi-functional exhibition halls, based on the micro-perforation theory, this paper systematically analyzes the sound insulation and sound absorption properties of ultra-microporous honeycomb aluminum panels. By establishing an acoustic finite element model, simulation technology was used to explore the sound insulation and sound absorption coefficient of ultra-microporous honeycomb aluminum panels in the range of 100Hz to 5000Hz. At the same time, the sound insulation amount and sound absorption coefficient were experimentally measured by combining the reverberation chamber method and the standing wave tube method. The results show that the simulation results of ultra-microporous aluminum honeycomb panels are highly consistent with the experimental data. The weighted sound insulation is 27.0dB (experimental value 26.8dB), and the sound absorption coefficient NRC reaches 0.63, which is significantly better than ordinary aluminum honeycomb panels. Research shows that ultra-microporous honeycomb aluminum panels have good noise reduction effects, help improve the acoustic environment in large spaces, and improve personnel comfort.