Underwater radiated noise from modern commercial ships.

@article{McKenna2012UnderwaterRN,
  title={Underwater radiated noise from modern commercial ships.},
  author={Megan F. McKenna and Donald Ross and Sean M. Wiggins and John A. Hildebrand},
  journal={The Journal of the Acoustical Society of America},
  year={2012},
  volume={131 1},
  pages={
          92-103
        }
}
Underwater radiated noise measurements for seven types of modern commercial ships during normal operating conditions are presented. Calibrated acoustic data (<1000 Hz) from an autonomous seafloor-mounted acoustic recorder were combined with ship passage information from the Automatic Identification System. This approach allowed for detailed measurements (i.e., source level, sound exposure level, and transmission range) on ships of opportunity. A key result was different acoustic levels and… 

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References

SHOWING 1-10 OF 40 REFERENCES

Directionality and maneuvering effects on a surface ship underwater acoustic signature.

This work examines underwater source spectra of a small (560 tons, 40 m length), single-screw oceanographic vessel, focusing on directionality and effects of maneuvers, and proposes an empirical model assuming that spectral source levels exhibit simultaneous variations in aspect angle, speed, and turn rate.

Radiated noise characteristics of a modern cargo ship

Radiated noise directionality measurements indicate that the radiation is generally dipole in form at lower frequencies, as expected, but there are some departures from this pattern that may indicate hull interactions.

INCREASED UNDERWATER NOISE LEVELS IN THE SANTA BARBARA CHANNEL FROM COMMERCIAL SHIP TRAFFIC AND THE POTENTIAL IMPACT ON BLUE WHALES (BALAENOPTERA MUSCULUS)

The Channel Islands National Marine Sanctuary (CINMS) and the surrounding waters are considered an urban coastal environment, yet home to a diversity of marine organisms. Understanding the

An ensemble source spectra model for merchant ship-radiated noise.

An evaluation of the classical model for determining an ensemble of the broadband source spectra of the sound generated by individual ships and an alternate model to overcome the deficiencies is presented and a joint probability density on the two parameters of the single term model based on the measured histograms of these parameters is proposed.

Anthropogenic and natural sources of ambient noise in the ocean

Ocean ambient noise results from both anthropogenic and natural sources. Different noise sources are dominant in each of 3 frequency bands: low (10 to 500 Hz), medium (500 Hz to 25 kHz) and high (>25

Characterizing the Relative Contributions of Large Vessels to Total Ocean Noise Fields: A Case Study Using the Gerry E. Studds Stellwagen Bank National Marine Sanctuary

Noise produced by large commercial vessels was at levels and within frequencies that warrant concern among managers regarding the ability of endangered whales to maintain acoustic contact within greater sanctuary waters.

Deep sound channel noise from high‐latitude winds

The contribution to underwater ambient noise from the persistent winds which blow at high latitude is discussed and estimated. Energy is ducted into low‐loss paths in the deep sound channel by

A 50 year comparison of ambient ocean noise near San Clemente Island: a bathymetrically complex coastal region off Southern California.

Repeated ocean ambient noise measurements at a shallow water (110 m) site near San Clemente Island reveal little increase in noise levels in the absence of local ships. Navy reports document ambient

High-frequency Acoustic Recording Package (HARP) for broad-band, long-term marine mammal monitoring

  • S. WigginsJ. Hildebrand
  • Environmental Science
    2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies
  • 2007
Advancements in low-power and high-data-capacity consumer computer technology during the past decade have been adapted to autonomously record sounds from marine mammals over long periods. Acoustic

Physics of Sound in Marine Sediments

I. Theory.- A. Derivation.- A Review of the Derivations of the Formulas for the Acoustical Properties of Liquid-Solid Mixtures.- Acoustic Waves in Saturated Sediments.- B. Interpretation.- Acoustic