Hearing Interference

8	For this experiment, you will need; A Signal Generator Two speakers

Connect the signal generator to the two speakers and place the speakers in two adjacent corners of the room facing the centre.  Set the signal generator to 3000Hz and slowly walk around the room.  The volume produced by the speakers should appear very loud in some places and quiet in others, only a few centimetres away.  This is a result of superpostion (interference).  The two sound waves are adding together in some places and cancelling each other out in others.