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## Homework Statement

Two lound speakers are each located 16m from a wall and are 0.8m apart. They play a 3000 Hz sound, both speakers are in phase. Bill is located at the wall at the m=0 maximum of sound interference. If he walks along the wall, how far does he have to walk to hear m=1 maximum? (The speed of sound is 343 m/s.)

## Homework Equations

2pi * (x2-x1) / lambda = 2mpi

vsound = lambda*f

## The Attempt at a Solution

343 m/s = lambda*3000Hz

lambda= .1143 meters

Beyond that, I do not know how to solve it.

Thank you.