Study on Sound Absorption Performance of Micro-Perforated Structure with Built-In Perforated Baffle

Abstract

Micro-perforated plate structure is widely used in the field of noise reduction because of its advantages such as light weight, oxidation resistance and easy machining. In order to improve the sound absorption performance of single-layer micro-perforated plate, a perforated baffle which is vertical to the upper panel is added into the micro-perforated plate structure, and the micro-holes in the baffle plate are used to improve the noise reduction effect of the whole structure. Studies