Tinnitus is the term for hearing sounds that come from inside your body, rather than from an outside source.
It’s often described as “ringing in the ears”, although several sounds can be heard, including buzzing, humming, grinding, hissing, whistling.
Some people may hear sounds similar to music or singing, and others hear noises that beat in time with their pulse (pulsatile tinnitus).
It is believed that most people have some sorts of ear noise, or noise inside their heads, all of the time. If we were in a soundproofed room, with no other noise, most of us would experience some kind of tinnitus.
However, most people don’t notice the slight background ringing in the ears for the majority of the time, because they are distracted by the noise going on around them and if they do become aware of it their subconscious mind automatically tunes it out for them.