Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Wave Interference and sound waves

  1. Apr 4, 2010 #1
    1. The problem statement, all variables and given/known data

    Two loudspeakers emit sound waves along the x-axis. A listener in front of both speakers hears a maximum sound intensity when speaker 2 is at the origin and speaker 1 is at x= 0.540 m. If speaker 1 is slowly moved forward, the sound intensity decreases and then increases, reaching another maximum when speaker 1 is at x=0.950 m.

    a: What is the frequency of the sound? Assume velocity of sound=340 m/s
    b: What is the phase difference between the speakers?

    2. Relevant equations
    The only equation I could relate to this would be the maximum constructive interference equation: 2pi * [tex]\Delta[/tex]x/[tex]\lambda[/tex]+ phase shift= m*2pi

    3. The attempt at a solution
    I'm not sure what m would be or what value I would be solving for in part a

    help please?
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Apr 4, 2010 #2
    thr is no restriction on m..so you can simply choose it by urslf..
    well i took it 1...
    for part one...simple clue...
    distance between two speakers shud be integer multiple of lambda...
    so in one case take it m and in 2nd take it (m+1)...
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook