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

Resonance ans normal modes in an open pipe

  1. Oct 30, 2008 #1

    I have a question about standing sound waves in an open pipe caused by a speaker, I know that normal mode frequencies are given by

    [tex]f_n = n\frac{v}{4L}, \quad n=1,2,3,...[/tex]

    if we put a microphone into the pipe, and if the frequency of the speaker is a normal mode frequency, we see nodes and antinodes.

    but I dont understand what happen when the speaker frequency isn't a normal mode frequency.. I think that we see always nodes and antinodes but they have lower amplitude, I'm not sure at all.

    If someone can help me, it would be nice.

  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted