Problem
The lavalier is mounted too low on the chest, causing inconsistent speech level as the presenter changes posture.
Solution
Root Cause / Diagnostic:
Mounting a lavalier lower than the sternum increases the relative acoustic distance change when talent tilts their head down or shifts posture. Under the inverse-square law, dropping head distance from 20cm to 35cm results in an audible 5dB volume drop and loss of presence.
Actionable Fix:
1. Relocate the lavalier capsule to the center of the sternum, exactly 15 to 20 cm (6 to 8 inches) below the chin.
2. Secure the clip firmly to the garment center placket or tie knot so the mic remains fixed relative to vocal projection.
3. Record a 15-second speech test across different posture changes; confirm average RMS levels remain stable within ±1.5 LUFS.
Pro Tip:
Use a broadcast broadcast chest-harness or vampire clip under the collarbone if clothing buttons do not permit ideal sternum placement.
Mounting a lavalier lower than the sternum increases the relative acoustic distance change when talent tilts their head down or shifts posture. Under the inverse-square law, dropping head distance from 20cm to 35cm results in an audible 5dB volume drop and loss of presence.
Actionable Fix:
1. Relocate the lavalier capsule to the center of the sternum, exactly 15 to 20 cm (6 to 8 inches) below the chin.
2. Secure the clip firmly to the garment center placket or tie knot so the mic remains fixed relative to vocal projection.
3. Record a 15-second speech test across different posture changes; confirm average RMS levels remain stable within ±1.5 LUFS.
Pro Tip:
Use a broadcast broadcast chest-harness or vampire clip under the collarbone if clothing buttons do not permit ideal sternum placement.