First they listened to classical music, but that was too soothing. Then they listened to guitar-studded rock with a heavy beat. And that was just right. The heavy bass of rock is what tends to annoy ...

See if you can hear this: you’re sitting on your porch drinking your morning coffee. The cool, crisp air blows through the leaves on the tree, or the equivalent of 20 decibels. Off in the distance you ...