Non-flammable sound-absorbing panel for various applications including concert hall has three layers of woven glass fibers held in metal frame to give broadband absorption characteristic

摘要

The panel (1) has a rectangular metal frame (2) extending around the edges of panels made of three layers of woven glass fibers. The frame may be fastened by friction at the edges or may be keyed into the panels. The panels are devoid of natural mineral fibers and may absorb sound waves over a broad band extending from 250 Hz to 4 kHz.