Here is the problem: Two speakers separated by a distance of 3m emit sound waves of frequency 550Hz. The velocity of sound is 330m/s. Find the distances from the source at which the intensity of the sound will be a maximum. What i have so far.. Since we are trying to look for the places where there is constrictive interference (maxima), we can use .. d sin x = lambda*n . Maxima will occur when the path difference is 0, 1 wavelength or an integral multiple of wavelengths (ie: lambda*n) So we find the wavelength .. lambda = V/f = 0.6 m The first maxima should occur at 0m, then .. 3 sin x = 0.6 3 sin x = 0.6*2 , etc I'm not seeing how to get the next distances after that (am I even in the right path?) :(. Any hints? Thank you in advance.