Clink/Ping/**** Crystal Like Sound When I Tap the Screen

For the past 2 weeks or so, Ive noticed that my iPhone makes a ding that sounds like when you clink glasses together whenever I touch the screen.

The screen could be active or black. The phone could be off or on. It happens at any time of the day and I can command it to happen at will. Ive taken the phone case off to see if that could be the problem. Still makes the clink sound when I tap the screen. My phone isnt bent and the screen is not separating from the body of the phone.

I do have a glass screen protector on that has a stress fracture on the screen protector only no cracks in the iphone glass itsself.

I notice the crystal like sound can be commanded at will by moderately tapping the upper right hand of my screen. Anybody else have this problem?