An acoustic double-slit system (of slit separation d and slit width a) is driven by two loudspeakers as shown in Figure. By use of a variable delay line, the phase of one of the speakers may be varied relative to the other speaker. Describe in detail what changes occur in the double-slit diffraction pattern at large distances as the phase difference between the speakers is varied from zero to 2n. Take both interference and diffraction effects intoaccount.

Transcribed Image Text:

Variable delay line Audio signal generator Speakers