Acoustic material shortlists for noise-control projects routinely collapse into three names: perforated acoustic panels, bare/un-faced mineral wool slabs, and cement-bonded wood wool boards. On paper they all "absorb sound." On site they behave very differently in NRC stability, fire continuity, fiber migration, washdown tolerance, impact duty and joint sealing. This module runs a procurement-grade head-to-head for acoustic engineering firms, plant retrofit GCs, gymnasium and sports-hall builders, machine-room contractors, KTV/AV installers and purchasing engineers. SAMZOON, a Foshan source manufacturer, anchors the verdict with custom perforation, core pairing, free pre-bid coupons and South China acoustic project QC.