For the clearest sound of someone speaking, where should a lavalier microphone be placed on their clothing?

For the clearest sound of someone speaking, a lavalier microphone should be placed on their clothing, centrally located on the upper chest, typically around the sternum. This optimal position is approximately six to eight inches (15-20 centimeters) below the chin, with the microphone capsule pointed directly towards the speaker's mouth. This specific placement addresses several critical acoustic factors for superior vocal clarity. It effectively manages the "proximity effect," which is an artificial boost in bass frequencies that occurs when a directional microphone is too close to the sound source. Placing the microphone at the sternum distance prevents an unnaturally boomy or muddy sound, ensuring a natural and balanced vocal tone. Furthermore, this distance significantly reduces the impact of "plosives," which are explosive bursts of air produced by speech sounds like 'P' and 'B'. When a microphone is too close to the mouth, these air bursts cause distracting popping noises; the sternum placement mitigates this by allowing the air to dissipate before reaching the microphone. Crucially, the sternum location maintains a consistent distance from the speaker's mouth even as their head moves naturally, providing uniform audio levels and consistent sound quality. Finally, this placement minimizes unwanted noise from clothing friction, hair, or jewelry contact, as the microphone is securely clipped in a stable area away from constant movement, ensuring only the spoken word is captured clearly.