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## Homework Statement

Two loudspeakers A and B of equal power are separated by a distance of 1.4 m. Both the speakers emit sound waves in phase and of frequency 450 Hz. If a microphone were to be moved from A in a direction perpendicular to AB, at what distances from A will it detect a minimum of sound intensity? ( Take the velocity of sound in air to be 330 m/s )

## Homework Equations

c=fλ,

## The Attempt at a Solution

I have no idea where to even start. I tried using Pythagoras' theorem and could go no further.