섬유상 배후내장재의 구조적 특성이 흡음성능에 미치는 영향

초록

In this study, the effects of the thickness, fiber diameter, and solidity of rear acoustic absorbents on sound absorption coefficient were investigated. Polyester 100% nonwovens (needlepunching) consisting of different fiber fineness were selected for rear acoustic absorbents. The capacity of sound absorption was measured by the two-microphone impedence measurement tube (KS F 2814), and sound absorption coefficient was calculated. Air permeability (ASTM D 737) was measured to estimate the structural characteristics of acoustic absorbents. It was found that the amount of sound absorption by rear acoustic absorbents increased throughout the whole frequency range with increasing thickness and solidity, and with decreasing fiber diameter, which results from the reduction of air permeability. Based on the results of this study, it is expected that efficient sound absorption capacity through the whole frequency range can be achieved by applying various combination of rear acoustic absorbents to the interior of buildings.

키워드