Unverified90% confidenceCautionTime unknown
临街低频交通噪音严重（如临主干道、地铁高架）不要指望隔音窗帘解决，钱应优先花在换中空双层玻璃或加装隔音窗上，窗帘只作最后1-2dB的补充，否则花高价买厚帘会失望
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