At what minimum angle relative to the centerline perpendicular to the doorway will someone outside the room hear no sound when sound with a frequency of 1300 Hz leaves a room through a doorway with a width of 1.02 mm? Use a speed of sound in air of 344 m/s and assume that the source and listener are both far enough from the doorway for Fraunhofer diffraction to apply. You can ignore effects of reflections.
A) 5.73 degrees.
B) 10.11 degrees.
C) 2.67 degrees.
D) 7.35 degrees.
