iPhone 15 weird random noise

I bought a brand new iphone 15 in November 2023. My phone was fine for the first month but after some time, it started to randomly do a weird sound, it lasts probably from 4-10 second and then goes back to normal for a week or so before doing it again. It sounds like plastic (i don’t really know how to explain) but comes from my phone.

Even when this is happening the phone is fine, works perfectly and everything.

My phone never fell, never got in water or anything like that.

Does anyone have the same problem? I’m really concerned.