baffle

1. A device used to dampen, muffle, restrain, or otherwise control the movement of a fluid, or waves travelling through a fluid such as light or sound; specifically, a surface positioned inside an open area to inhibit direct motion from one place to another without preventing motion altogether. (countable, uncountable) · Tanker trucks use baffles to keep the liquids inside from sloshing around.
2. A device to prevent the spreading of sound or light. (countable, uncountable) · sound baffle
3. A barrier designed to obstruct and confuse enemies, rendering them vulnerable. (countable, uncountable)

Plural baffles