Just heard very loud pop in my ear loud enough to make me jump-like someone took plastic bubble wrap &popped it directly in ear.no hearing loss.cause?

Ear popping : An audible pop in the ear could be caused by the eustachian tube opening suddenly, causing a pressure differential in the middle ear, which you hear as a pop. Another common source of popping in the ear can be the jaw popping with opening the mouth, typically. If this keeps happening, you may need to see a doctor to evaluate this and probably an ENT would be best.