INTERIOR SOUND ABSORPTION SHEET AND SOUND ABSORPTION TYPE SOUNDPROOFING PANEL INCLUDING THE SAME

摘要

The present invention provides a sound absorption sheet including: a porous base material; and a micro-resonant layer which has multiple patterned sound absorption holes which penetrate both sides. The present invention provides a sound absorption type soundproofing panel which covers the outer surface of a sound absorption material by using the sound absorption sheet including: the porous base material; and the micro-resonant layer which has the multiple patterned sound absorption holes which penetrate the both sides.