I've heard of standing waves in reference to acoustically treating rooms.
It's when a wave bounces off a wall and reinforces the same frequency wave on its way back.
EDIT: these standing waves are undesirable, and can be eliminated through non-parallel walls,
rounding of corners and edges, sound absorbing panels, and other means. /Edit.
I suppose it could also be applied to the interior surfaces of drums.
That's different than a fundamental frequency though.
I like Gruntersdad's winter/spring solstice tuning method better though.
.