A long time ago, in an era known as the not-too-distant past, machines made sounds as a byproduct of how they worked. Car engines roared, camera shutters clicked, phones rang bells. I feel like a dinosaur describing these features of life that continued well through the 1990s, but bear with me, dear reader. Nowadays, more sophisticated technology, such as computers and lasers, remain silent when utilized. While that may seem pleasant, it’s actually posing a problem for the military.