NOISE ABSORPTION EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To provide a noise absorption equipment which is used when noise is absorbed by using a rear air layer and absorbs noise of high to low tone regions from both sides regardless of limited thickness by making good use of the fluctuating property of a sound wave. SOLUTION: Such an acoustic material is used in this noise absorption equipment, as is obtained by interposing an aluminum plate 102 between a pair of acoustic plates 101, 103 obtained by subjecting a metallic fiber material to compression molding.