Unverified90% confidenceFactTime unknown
STC值是隔声（隔墙）指标，主要由隔声毡+龙骨+石膏板复合结构决定；NRC值才是吸音棉的核心指标。选吸音棉看NRC（0-1），NRC≥0.8为优秀，选隔声材料才看STC≥50
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