Pro blem #4 Two identical loudspeakers are located at points A and Bi ZUm apart. They both have a frequency of 7'84Hz. Take the speed of sound in air to be 344111]; 3. A small microphone lies along a line perpendicular to the line connecting A and B [line BC in Figure below). {a} Taking the speakers to he at X = Ill, at what 1values of x will there he destructive interference? (h) At what values of x will there be constructive interference? {c} If the frequency is made low enough: there will he no positions along the line BU at which destructive interference occurs. How low must the frequency be for this to be the case? A E' T 2.00 In Ix>l Figure 2: Diagram of the setup of speakers and microphone