[KongchangAI]
Unverified80% confidenceDecision RuleTime unknown

吸音挂毯的实际降噪能力取决于面密度而非视觉厚度,面密度≥1500g/㎡(厚重羊毛/绒面)在中高频(500Hz-2kHz)语音频段可实现约0.3-0.5的吸声系数,而薄棉麻挂毯(<400g/㎡)几乎无吸音作用,仅起装饰效果

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Long-term
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