3M耳塞果然是劳保用品，隔绝高频噪声很不错，但是隔绝人声就不太行🤪
@leo_song 耳罩也非常好用！
@fulkrum 我需要全频率的耳塞，而不是特定有害的频率
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@fulkrum 我需要全频率的耳塞，而不是特定有害的频率