Hello. Thank you for posting.
Do you mean ringing in the ears? Subjective tinnitus is tinnitus only you can hear. This is the most common type of tinnitus. It can be caused by ear problems in your outer, middle or inner ear. It also can be caused by problems with the hearing (auditory) nerves or the part of your brain that interprets nerve signals as sound (auditory pathways).
More information here: https://www.webmd.com/a-to-z-guides/understanding-tinnitus-basics