I suffer from insomnia and enhanced senses. This includes my hearing. Sadly I have very noisy neighbors. Ones that play their music until 4 am. So I try to use fans to cover the sound. They weren’t strong enough. So I use this combined with my fans and it actually has been helping. I’ve been able to get more sleep than I used to. Now it’s my bladder that wakes me up more time than the sounds around me  It does need constant charging though