Tinnitus is the perception of sound in the absence of external sound stimulation. It can be perceived as a ringing, buzzing or even roaring sensation. Some people have described it to sound like the chirping of crickets, or the sound of the ocean.
Tinnitus has been experienced by most of us, and for many, it does not persist or result in cause for concern. Tinnitus is mostly a benign phenomenon in and of itself, however it can occur with other conditions and always warrant investigation.