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Why do gunners open their mouths when firing cannon?

December 28, 2016 | Author: | Posted in Human Physiology

Gunners often open their mouths to protect their eardrums while firing large guns. When the mouth is open the air waves set in motion by the discharge of the cannon enter the throat as well as the ears; consequently the sudden pressure against the outside of the drums is counteracted by an equal pressure against …

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