1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Destructive interference of sound waves

  1. Apr 5, 2008 #1
    1. The problem statement, all variables and given/known data

    Two loudspeakers are located 3.42m apart on an outdoor stage. A listener is 18.80m from one and 19.60m from the other. During the sound check, a signal generator drives the two speakers in phase with the same amplitude and frequency. The transmitted frequency is swept through the audible range (20 Hz to 20 kHz). What are the three lowest frequencies at which the listener will hear a minimum signal because of destructive interference.

    2. The attempt at a solution

    I know that (2n+1)/2 * wavelength = 19.6 - 18.8. So I try different values of n to find the wavelength then from this I try to calculate the frequencies. But I don't understand what the distance between the two speakers has to do with the problem.
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted

Similar Discussions: Destructive interference of sound waves
  1. Waves & Interference (Replies: 0)

  2. Sound wave (Replies: 0)

  3. Wave Interference (Replies: 0)