posted by Dana on .
Two speakers 14m apart are emitting tones at a frequency of 1020 Hz. what is the closest distance (in m) from one speaker, along the line connecting the speakers, at which the sound intensity will be zero?
The closest point?
let a be the distance, so 14-a is the other distance.
Now to be zero amplitude, these two waves have to be 1/2 Lambda different.
checking this (I don't believe it)
6.958/.167=41.66 half wavelengths
(14-6.958)/.167=42.17 half wavelengths
the difference is indeed half wavelength.
check my work, I am still wondering.