MYRTLE BEACH, SC (WMBF) - An official with the Shaw Air Force Base confirmed they are responsible for an overnight boom heard throughout ... base and confirmed the sound was a part of the training.

BOOM! What was the earth-shaking, jolt-you-awake, set-off-the-car-alarm sound? Oh right, a rocket launch. But why are some rocket launches accompanied by sonic booms and others aren’t?

Being aesthetically pleasing is a big part of the appeal when choosing ... Outside of the cylindrical shape for '360-degree sound,' the Ultimate Ears BOOM 4's defining visual design feature ...