Assume that you are in an open field where two loudspeakers are set up and joined to the similar amplifier so that they emit sound waves in phase at 688 Hz. Take the speed of sound in air to be 344 m/s.
i) When you are 3.00 m from speaker A directly to your right and 3.50 m from speaker B directly to your left, will the sound which you listen to be louder than the sound you would hear if just one speaker were in use?
ii) What is the minimum distance d you require walking forward to be at a point where you can’t listen to the speakers?