Destructive Interference Question

[adhoward24]

Light Question
1. Homework Statement

A student enters Best Buy prepared to buy a pair of speakers. Before he does so, he conducts an experiment with them. He places the speakers 4.0 m apart and connects a signal generator to both speakers that produces a single and consistent tone. (constant wavelength and frequency) He then walks to a point that is 2.0 m from one speaker and 2.3 m from the other. At that point he notices a quiet “spot”. If the speed of the sound in the room is known to be 350 m/s, calculate the possible frequencies being played by the speakers.

2. Homework Equations



3. The Attempt at a Solution

I don't even know where to begin. I don't even know how to go from speed to frequency. Thanks for any and all help

 

[ideasrule]

What's the condition for destructive interference?

For a wave, speed, frequency, and wavelength are related by v=f*lambda.