A lavalier microphone is a very small condenser mic that can be clipped to a lapel to remain in close proximity to the mouth of the speaker. It is also often called a tie-clip mic. Because they are visually unobtrusive and give great audio quality, lavs are now the default choice for TV presenters and interview subjects. A subset of the lav is the headworn mic, which is either hidden in the performer's hair or on a small boom that's clipped around the ears. This ensures the mic stays close to the mouth even if the head is turned.