What is tinnitus? Tinnitus definition Tinnitus is an awareness of sound in the ears or head which is not from an external source. There are many different types of tinnitus sounds. Common descriptions are that it is a hiss, whistle, whirr, ring or buzz. Occasionally, it can be segments of music. The pitch can be high or low and the level can vary over time. How common is tinnitus? In its mildest form, tinnitus is extremely common and many people experience occasional sounds in their ears, for example after being in a noisy place such as a concert. An estimated 10% of the UK adult population experience tinnitus frequently. Around 5% find it affects their quality of life. Types of tinnitus There is two main types: subjective and objective tinnitus. Subjective: This can be heard only by the person. It is by far the most common type of tinnitus. Objective: This can be heard by somebody examining the person and is very uncommon. It can be caused by a variety of phys