Two in-phase speakers are 2.80 mapart and emit an unknown single frequency of sound in alldirections. At a point 2.00 m away from one speaker on the line ABbetween the two speakers a sound detector records a sound intensitymaximum. The detector is then moved perpendicularly away from theline AB. The first time the sound intensity is again measured to bea maximum occurs at y= 1.50m away from the line AB.
What is the frequency of the sound emitted by the speakers? (NOTE:The path difference decreases as the detector moves away from theline AB; therefore you can't assume that the path differenceinitially is one wavelength. You must leave n as a variable andalgebraically eliminate it.)
