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B Speed of sound in steel dependance on temperature

  1. Jul 29, 2017 #1

    Nice easy question for you all today:

    I would like to know how the speed of sound in steel varies with temperature. A google search didnt reveal a great deal, so if a physicist could confirm the relationship, that would be much appreciated.

    I know that: v = √shear modulus/density

    However, im also aware that both shear modulus and density ought to decrease with increasing temperature.

    So I suppose its a matter of which one decreases by the largest fraction for a given temperature rise! I dont know the answer.

    So...does the speed of sound in steel increase or decrease with increasing temeprature?

    A secondary question...is there any dependance on frequency? (ultrasound vs low freq for example)

    Thank you for your time.
  2. jcsd
  3. Jul 29, 2017 #2


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    You could look up the temperature coefficients of those two quantities in steel and plot yourself a graph. You have the correct formula. :smile:
    I think this link could be useful for dispersion information.
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