Apple Earphones making a very loud static noise

I own an iPhone 7. A few hours ago, I was listening to music and everything was working. All of a sudden, when the music paused without myself touching the screen or anything, it started to play very loud static noises. (I pressed the "Play" button on the screen and it started making the noise.) It hurt my ears a lot. I'm sure that the earphones are not the issue, since they work perfectly fine with my iPad. I'm guessing that the problem is the adapter. The question is: Is it really the adapter, or my iPhone 7?