A small loudspeaker is located at a large distance to the
Chapter , Problem 20(choose chapter or problem)
A small loudspeaker is located at a large distance to the east from you. The loudspeaker is driven by a sinusoidal current whose frequency can be varied. Estimate the lowest frequency for which one of your ears would receive the sound waves exactly out of phase with that received by your other ear when you are facing north.
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