physics: Beat is the perception of the sum of two close frequencies as one frequency that oscillates between zero intensity and full intensity, caused by the alternating constructive and destructive interference.
... town is 82.46% White, 7.39% African American, 0.08% Native American, 1.62% Asian, 0.08% Pacific Islander, 5.94% from other races, and 2.43% from two or more races. 16.62% ...