Two identical loudspeakers \(2.0 \mathrm{~m}\) apart are emitting \(1800 \mathrm{~Hz}\) sound waves into a room where the speed of sound is \(340 \mathrm{~m} / \mathrm{s}\). Is the point \(4.0 \mathrm{~m}\) 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 something in between?