Unverified50% confidenceFactTime unknown
隔音窗帘对高频噪音（人声、鸟叫）有一定衰减（约5-10dB），但对低频噪音（马路车流、地铁、空调外机）几乎无效，低频降噪必须依靠中空玻璃或加装隔音窗，窗帘只能作为辅助
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