1. The problem statement, all variables and given/known data Having a real tough time with this problem was wondering if anybody could help Two identical loudspeakers 2 m apart are emitting 1800hz sound waves into a room where the speed of sound is 340m/s. Is the point 4m directly in front of one of the speakers, perpendicular to the plane of the speakers , a point of maximum constructive interference, perfect destructive interference, or somthing in between 2. Relevant equations L=(m)xW/2 destructive L=nxW constructive 3. The attempt at a solution If L=4m then for constructive n would have to equal 0,1,2,3......whole # If L is perfectly destructive then m would have to equal 1,3,5...odd # Is that correct.