The sound of rain sound is 0-20KHZ, which is a kind of white noise. White noise can play a certain role in the treatment of sounds for people of all ages. It is a "harmonious" therapeutic voice.
雨声的音频在 0-20KHZ，是属于白噪音的一种。而白噪音对各个年龄层的人来说，都可以起到一定声音治疗作用，是一种“和谐”的治疗声音。
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