1、雨季情绪(下雨的声音)
https://link.zhihu.com/?target=https%3A//rainymood.com/
2、VirtOcean(海洋的声音)
https://link.zhihu.com/?target=http%3A//virtocean.com/
3、Purrli(猫打呼噜的声音)
https://link.zhihu.com/?target=https%3A//purrli.com/
4、Meteor showers(太空视角观看流星雨)
https://link.zhihu.com/?target=https%3A//www.meteorshowers.org/
怀旧类
1、Inspirograph(怀旧在线万花尺)
https://link.zhihu.com/?target=https%3A//nathanfriend.io/inspirograph/
2、秘密花园(中文网站考古)