Advertisement

Applied Scientific Research, Section B

, Volume 1, Issue 1, pp 35–49 | Cite as

A new method for measuring sound absorption

  • C. W. Kosten
Article

Summary

The electric impedance of a loudspeaker depends upon the acoustical load and may be used for measuring this load. The relation between the electric impedance of an electrodynamic loudspeaker and the acoustic impedance in front of the loudspeaker is given and discussed in detail. The consequences of the flexibility of the cone are studied. Simple formulas and graphs are given, connecting the electrical behaviour and the absorption coëfficient corresponding to the load on the loudspeaker. The method seems to permit absorption measurements at low frequencies (e.g. 50–500 Hz).

Keywords

Sound Absorption Inversion Centre Inversion Point Extreme Left Double Ratio 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1).
    A. E. Kenne11y, Electrical vibration instruments, page 190, New York 1923.Google Scholar
  2. 1a).
    R. D. Fay, J. Acous. Soc. Am.15, 32, 1943.CrossRefADSGoogle Scholar
  3. 1b).
    J. E. White, J. Acous. Soc. Am.18, 155, 1946.CrossRefADSGoogle Scholar
  4. 2).
    C. W. Kosten and C. Zwikker, Akust. Zs.6, 124, 1941.Google Scholar
  5. 3).
    J. B. Crandall, Theory of vibrating systems and sound, page 188, London 1927.Google Scholar
  6. 3a).
    P. M. Morse, Vibration and sound, page 304, New York and London 1936.Google Scholar
  7. 3b).
    K. Schuster and A. Hohberg, Ann. Physik16, 203, 1933.CrossRefADSGoogle Scholar

Copyright information

© Martinus Nijhoff 1950

Authors and Affiliations

  • C. W. Kosten
    • 1
  1. 1.Laboratorium voor Technische Physica der Technische HogeschoolDelft

Personalised recommendations