Your app is making a hissing sound. Definitely your app. Stops when I close it, starts when I open it. I’m worried my phone might explode
Fix your app.
Rob Stone commented
Thats the air filling up the censors heads, no brains in there, just hit air
justin sullivan commented
I can put my phone on mute and it continues the noise. Chht chht chhht chht. Fix it