Depth dependence of noise resulting from ship traffic and wind

Author

Shooter, Jack A. ; DeMary, Thomas E. ; Wittenborn, August F.

Author_Institution

Appl. Res. Lab., Texas Univ., Austin, TX, USA

Volume

15

Issue

4

fYear

1990

fDate

10/1/1990 12:00:00 AM

Firstpage

292

Lastpage

298

Abstract

Under conditions of distantly generated noise, the noise level is found to decrease with depth in the mid-northeastern Pacific. These data show a decrease in noise level greater than 25 dB between critical depth and the ocean bottom. A result of this decrease is that locally wind-generated noise can be detected on near-bottom receivers for wind speeds less than 10 kn. It is shown that the noise level generated form local sources such as wind and nearby shipping is almost independent of receiver depth. The differences in spectra shape between the distant shipping noise and wind-generated noise and the low noise levels detected near the ocean bottom allow the measurement in the frequency band at 200-500 Hz of local wind noise level for wind speeds less than 10 kn

Keywords

acoustic noise; oceanographic regions; oceanography; underwater sound; water pollution; 200 to 500 Hz; Pacific; acoustic noise pollution; depth dependence; distantly generated noise; marine pollution; ocean; ship traffic; underwater sound; vertical profile; wind; Frequency measurement; Marine vehicles; Noise generators; Noise level; Noise shaping; Oceans; Sea measurements; Shape measurement; Velocity measurement; Wind speed;

fLanguage

English

Journal_Title

Oceanic Engineering, IEEE Journal of

Publisher

ieee

ISSN

0364-9059

Type

jour

DOI

10.1109/48.103524

Filename

103524