Well, no. In any finite range of frequencies there are infinitely more harmonics that are in a noise signal than are in a square wave. In the audible frequenc

Well, no. In any finite range of frequencies there are infinitely more harmonics that are in a noise signal than are in a square wave. In the audible frequency and dynamic ranges, you realistically can’t perceive more than maybe 7 harmonics in a square wave and it sounds very different than a noise signal.