On the speed of sound

Kevin A. Krout, Siavash H Sohrab*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


A modified definition of root-mean-square speed of molecules is shown to lead to a modified form of Newton formula for isothermal speed of sound in ideal gas. The calculations based on modified theory and those based on classical adiabatic theory of Laplace are compared with available experimental data for (Air, N2, O2, Ar, He, CO2). Also, a modified formulation for propagation speed of long waves in canals by Chandrasekhar is presented leading to formula identical to that of Laplace.

Original languageEnglish (US)
Pages (from-to)29-34
Number of pages6
JournalInternational Journal of Thermodynamics
Issue number1
StatePublished - Mar 2016


  • Newton versus Laplace theory of sound
  • Speed of long waves in canals
  • Speed of sound

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)


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