Air conditioners have fans in them to help create the fan white noise that people love. The fan sounds play steadily over 4 hours. It's like having a virtual white noise machine in your bedroom.

Please follow my Youtube Channel for more sleep sounds:

https://www.youtube.com/channel/UC_0BSwQAjy_n_kpHEbSXrWA

The best way to experience RainManCJ:

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Disclosure: Some of the links are affiliate links. This means that, at zero cost to you, I will earn an affiliate commission if you click through the link and finalize a purchase.