Sound absorption by porous materials I

Summary

It is a well-known fact that, in order to obtain maximum absorption, sound-absorbing materials must not be fastened directly to the structural wall or ceiling, but must be kept at a certain distance, small in practice, from the wall or the ceiling. After describing a new interferometer some results concerning the influence of the thickness of the layer of air between material and wall are given. These results are discussed and explained theoretically. Most remarkable is the large influence of very thin layers of air on the frequency at which a maximum absorption is obtained.

This is a preview of subscription content, log in to check access.

References

  1. 1)

    J. van den Eijk and C. Zwikker, Physica8, 149, 1941.

    Article  ADS  Google Scholar 

  2. 2)

    C. Zwikker, J. van den Eijk and C. W. Kosten, Physica8, 469, 1941

    Article  ADS  Google Scholar 

  3. 3)

    C. Zwikker, J. van den Eijk and C. W. Kosten, Physica8, 1094, 1941.

    Article  ADS  Google Scholar 

  4. 4)

    C. Zwikker, Physica8, 1102, 1941.

    Article  ADS  Google Scholar 

  5. 5)

    C. Zwikker, J. van den Eijk and C. W. Kosten, Physica10, 239, 1943.

    Article  ADS  Google Scholar 

  6. 6)

    H. Wüst, Hochfrequenztechn. u. Elektroakustik44, 73, 1934.

    Google Scholar 

  7. 7)

    V. Kühl and E. Meyer, Bed. Ber. Phys. Math. Kl.26, 416, 1932.

    Google Scholar 

  8. 8)

    L. Cremer, Elektr. Nachr. Techn.10, 242, 1933.

    Google Scholar 

  9. 9)

    L. Cremer, Elektr. Nachr. Techn.12, 333, 1935.

    Google Scholar 

  10. 10)

    A. F. Monna, Physica5, 129, 1938.

    Article  ADS  Google Scholar 

  11. 11)

    J. Korringa, R. Kronig and A. Smit, Physica11, 209, 1945.

    Article  ADS  MathSciNet  MATH  Google Scholar 

  12. 12)

    C. W. Kosten and C. Zwikker, Physica8, 933, 1941.

    Article  ADS  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding authors

Correspondence to J. v. d. Eijk or C. W. Kosten or W. Kok.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

v. d. Eijk, J., Kosten, C.W. & Kok, W. Sound absorption by porous materials I. Appl. Sci. Res. 1, 50–62 (1950). https://doi.org/10.1007/BF02919928

Download citation

Keywords

  • Resonance Frequency
  • Porous Material
  • Sound Pressure
  • Sound Absorption
  • Wave Resistance