Tinnitus takes on many forms
Constant ringing, buzzing, whistling and hissing sounds in the ears can point to a common condition called tinnitus. Besides soft-to-loud ringing in the ears, the most common form of tinnitus produces soft-to-loud humming or rushing-water sounds.
Objective tinnitus is very rare and produces noises heard not only by the affected individual, but by others as well.