Two loudspeakers, S1 and s2, a distance d apart vibrate in phase and emit sound

Question

Two loudspeakers, S1 and s2, a distance d apart vibrate in phase and emit sound waves of equal amplitude and wavelength. Assume d<<L. (a) Describe how sound intensity I varies as a function of oosition x along the line segment OA. Sketch the graph of this function on the axes below. (b) Assume lambda<<d. On the axes provided below, sketch a graph of the sound intensity I as a function of position y along the y-axis. (c) Assume that d=2 meters and that the speed of sound is 360 meters per second. Find the lowest speaker frequency, which will uyield the minimum sound intensity along the line BB.

***sorry the image is reversed***

Explanation / Answer

two source interference (sound) c. 90 Hz

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