Unverified50% confidenceFactTime unknown
ANC对稳态低频噪音（空调、风扇、飞机引擎）降噪可达20-30dB，但对人声、键盘声等中高频突发噪音几乎无效，指望降噪耳机屏蔽室友说话或装修声是误区，需叠加白噪音掩蔽
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