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Question on Magnetic polarization

  1. Mar 22, 2008 #1
    Question on Magnetic polarization

    Is it possible to hear/record the sound created by the shifting of the alignment of magnetic dipoles when introduced to an external magnetic field?

    I believe that for some materials, this shifting causes friction which in return produces sound. Has anyone done this before?
  2. jcsd
  3. Mar 30, 2008 #2
    Once I saw (or rather heard) an experiment on this topic. If I understand it right, you don't have to wait for dipoles to cause mechanical vibrations. With a microphone you can get sound directly from moving dipoles, because they cause changing magnetic field which induces voltage in the microphone.
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