Headphone Heartbeats

There was the legend of headphones with a crazy myth attached to them you heard a heartbeat if you believed that what you were listening to was heartfelt enough, and you went looking for them because your heart told you too thinking about would make you see it from a logical point of view.
No they don't exist how could something like that be possible to hear a heartbeat you don't know how many heartbeats are being played in your ears, because you've never heard it before you just know it's out there somewhere.
Many people on the block had their own stories they heard about them only one of those are true.