Question

PartA How far must the microphone be moved to the right to find the first intensity minimum? Two loudspeakers are placed 3.00 m apart, as shown in the figure below. They emit 470-Hz sounds, in phase. A microphone is placed 3.20 m distant from a point midway between the two speakers, where an intensity maximum is recorded. (Figure 1) z- 1 Value Units Submit Figure of 1 Incorrect. Try Again; 4 attempts remaining Part B 3.00 m Suppose the speakers are reconnected so that the 470-Hz sounds they emit are exactly out of phase. At what positions are the intensity maximum and minimum now? Assume 0 3.20 m Enter your answers numerically separated by a comma. Submit

Answer 1

4 16 [343 )) ב-ן) 3.00( 2343( 2 4(3.00)-- 470 4 470 343 343 470 (3.10+470 16 35.47ґ-1. 1983-5. 118+ 0.01 77-0 35.47ґ-6.2986-0 2 6.2986 35.47 r- V0.1776 x 0.42m If it is out ofphase then the maxima and minimum will be interchanged. Maximum at x0.42 m Minimum at midway between the speakers -0