Omnidirectional mics pick up sound from all around the capsule, and this polar pattern is popular on lavalier mics clipped to a presenter's clothing, as the wearer is likely to look up and down and turn their head from side to side while speaking. With omni lavs, it's also common to mount them upside down. This shields the capsule's top from plosives and nasal exhales, with only a small decline in high frequency response and sound level.