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Relationship between speed of sound and density

  1. Dec 7, 2008 #1
    is there a relationship between the speed of sound and the density or the young modulus of the substance?
    if so what is it?
  2. jcsd
  3. Dec 7, 2008 #2


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    Staff: Mentor

    Yes, both! http://en.wikipedia.org/wiki/Speed_of_sound#General_Formula

    It is easiest to see in a solid object: the young's modulus determines the force applied by a compression wave of a certain amplitude. The density determines what acceleration particles of the object get when that force is applied. It's a collection of spring-mass systems.
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