Development of a mathematical model of sound insulation with flexible panels

Abstract

For sound insulation in the presence of restrictions related to transportation and installation conditions, practically the only possible constructive solution is the use of flexible panels. Also, the flexible panel provides reliable protection in the most difficult area - low frequencies, so modernization of the panel design is an actual topic for research. The object of the study is a mesh-plate panel. Flexibility is ensured by the following constructive solution - fixing the main soundproofing plates on a steel mesh bearing with basalt fabric with a gap. The sound insulation of the panel has been investigated experimentally. The goal is to develop analytical techniques evaluation flexible sound insulation panels based on the fundamental positions of industrial and architectural acoustics, sound insulation, and synthesis of published experimental studies of the effect of gaps (acoustic holes and voids). The calculation results are consistent with tests insulation panels manufactured at a sufficient level. As a result, it was described how the sound insulation of the panel is affected by the size, shape and filling of acoustic holes in the gap between the plates. Suggested ways to reduce their negative impact and optimize the design of a flexible soundproof panel.