Skip to main content
SpringerLink
Log in

Self-noise measurements using a moored sonobuoy with a suspended hydrophone

  • Technical Note
  • Published:
Marine Geophysical Researches Aims and scope Submit manuscript

Abstract

Moored sonobuoys are used for refraction seismic measurements at sea, although the range of operation is limited by the self noise caused by the hydrophone suspension.

In this paper the main causes of self noise are discussed and a useful deployment scheme of a moored sonobuoy with suspended hydrophone is described.

Some design criteria, in particular an equation for calculation of the optimal length of the expandable rubber band-which is situated between the surface float and the damping-body-are discussed.

Finally, it is shown from noise measurements during the ‘F. S. Valdivia’ cruise in 1975, that self noise level in the band 2 Hz to 20 Hz is 180 mPa to 280 mPa at a fully developed windsea with a characteristic wave height of more than 4 meters and a waterstream velocity about 0.5 m s1.

During these measurements the hydrophone was attached to the cable without rubber band. It is concluded that at a normal seastate the self noise level can be reduced to the order of ocean floor noise.

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

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Kebe, H.-W.: 1976. ‘Akustische Aufnehmersysteme für refraktionsseismische Untersuchungen auf See’, Berichtswerk Interocean76. Düsseldorf. Band II, 1114–22.

    Google Scholar 

  • Kebe, H. W.: 1978. ‘Optimierung verankerter akustischer Aufnehmersysteme für refraktionsseismische Messungen auf See unter Berücksichtigung der Einwirkungen des Seeganges und des Anströmens’, Diss., University of Hamburg, Hamburger Geophysikalische Einzelschriften, Reihe A, Heft 36.

  • McGrath, J. R., Griffin, O. M., and Finger, R. A.: 1977, ‘Infrasonic Flow-noise Measurements Using an H-58 Omnidirectional Cylindrical Hydrophone’, JASA 61, 390–6.

    Google Scholar 

  • Phillips, O. M.: 1956, ‘The Intensity Aeolian Tones’, J. Fluid Mech. 1, 607–24.

    Google Scholar 

  • Prendergast, V.: 1958, ‘Measurement of Two-point Correlations of the Surface Pressures on a Circular Cylinder’, University of Toronto, Inst. Aerophys., Techn. Note No. 23.

  • Urick, R. J.: 1960, ‘Flutter Noise in Suspended Hydrophones’, JASA 32, 1498.

    Google Scholar 

  • Weigel, W. and Wissmann, G.: 1977, ‘A First Crustal Section from Seismic Observations West of Mauretania’, Univ. Krakau, Publ. of the Inst. of Geophys., A-4 (115).

Download references

Author information

Authors and Affiliations

  1. Institute of Geophysics, University of Hamburg, Germany West

    H. -W. Kebe

Authors
  1. H. -W. Kebe
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Kebe, H.W. Self-noise measurements using a moored sonobuoy with a suspended hydrophone. Marine Geophysical Researches 5, 207–220 (1981). https://doi.org/10.1007/BF00163480

Download citation

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00163480

Keywords

Search

Navigation