Xbox one weird noise.

Hey guys, i was playing my xbox one today and noticed 2 very strange noises from what appears to be the fan that i haven't heard before. The first one is a high pitch noise as it spins, and the other is a buzzing that goes and comes at random times.

Are these normal or has anybody else had these.

Sounds very familiar to what my cousin experienced with his. Only happened once, and not since however.