Chapter 26, Problem 30P

Doorway diffraction. Diffraction occurs for all types of waves, including soundwaves. Suppose sound of frequency 1250 Hz leaves a room through a 1.00-m-wide doorway. At which angles relative to the centerline perpendicular to the doorway will someone outside the room hear no sound? Use 344 m/s for the speed of sound in air and assume that the source and listener are both far enough from the door.vay for Fraunhofer diffraction to apply. You can ignore effects of reflections.