PANEL THAT ABSORBS ACOUSTIC POWER IN RANGE OF LOW, MIDDLE AND HIGH FREQUENCIES, IN PARTICULAR POWER IN RANGE OF 400-5000 HZ

摘要

FIELD: construction materials. SUBSTANCE: device is designed as plate 1, which is made from semirigid foam material which pores are opened and are vented to one another, and layer 2, which consists of bundled fibers or from soft porous material. Set of said layers operated as mass-spring. EFFECT: increased functional capabilities. 1 dwg