In case you need to unwind away from your cats, you can listen to this relaxation music with the sound of a cat purring in the background. Scientifically, the frequency of a cat’s purr is exactly tuned towards the healing of bones. That means your cat can walk between your legs and break them when you fall. Then as you lie helpless on the ground, the cat can purr your bones to heal faster so you can get up again and feed the cat.