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白噪音的助眠原理是掩蔽突发噪音（如脚步声、关门声），所以'持续稳定'比'音效逼真'更重要，粉噪音(pink noise)比纯白噪音低频更多、更接近自然、长时间听不刺耳

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Unverified白噪音的实际助眠效果主要来自低频到中频的连续宽频声，真正掩蔽噪音的是'棕噪音/粉噪音'类而非高频'白噪音'，高频过多的机型长时间听会疲劳刺耳91% similar Unverified对声音极度敏感或需彻底静音入睡的人不适合白噪音机，应优先考虑物理隔音（耳塞/隔音窗），白噪音是掩蔽方案而非消除方案，本身也是持续声源86% similar Unverified白噪音功能要看是否为真实录制的自然音（雨声/心跳/子宫音）且可循环无缝衔接，劣质产品循环有明显断点反而干扰睡眠85% similar Unverified睡眠环境有间歇性突发噪音（车流、邻居）时，白噪音机需要能把音量开到接近这些噪音的水平才能有效掩蔽，最大音量太低的迷你机型掩蔽效果差85% similar Unverified内置白噪音/自然音（雨声、海浪、风扇声）的机型比纯音乐机型更适合助眠，因为无旋律起伏的稳态声音（40-60dB粉红噪音）掩蔽环境突发噪音效果更好，助眠音效数量应≥20种以避免长期单调化84% similar

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