I know nothing about firearms, but my naive assumption/half-remembered factoid was that the supersonic speed is partly what contributes to what I believed was a

I know nothing about firearms, but my naive assumption/half-remembered factoid was that the supersonic speed is partly what contributes to what I believed was a common phenomenon of it being difficult to infer where a gun was fired from based on the sound alone. (Not sure if that actually is a common phenomenon or just a trope.) Maybe any fast, loud noise is difficult to place and the supersonic crack is pretty irrelevant, though? Or maybe sounds tend to just be hard to place in general, similar to how eye witness reports tend to not be very reliable?