Title :
Measurement of vertical noise directionality with a mixed-polarity vertical array
Author :
Booth, Newell O. ; Judd, Randall ; Bucker, Homer
Author_Institution :
SPAWAR Syst. Center, Maritime Surveillance Div., San Diego, CA, USA
fDate :
7/1/2003 12:00:00 AM
Abstract :
A novel array was designed and tested in the eastern Pacific Ocean for the measurement of the vertical directionality of ambient noise. The results of the test, conducted in 1983, illustrate the existence of a 5-dB "noise notch" for arrival angles associated only with submerged acoustic sources. A measurement system based on improvements to the design and processing is described.
Keywords :
acoustic noise measurement; acoustic transducer arrays; array signal processing; oceanographic equipment; oceanographic techniques; underwater sound; LF ambient noise; acoustic noise measurement; array signal processing; eastern Pacific Ocean; measurement system; submerged acoustic sources; underwater acoustic arrays; underwater acoustic measurements; vertical noise directionality measurement; Acoustic measurements; Acoustic noise; Frequency; Noise level; Noise measurement; Oceans; Sea measurements; Sea surface; Surface waves; Underwater acoustics;
Journal_Title :
Oceanic Engineering, IEEE Journal of
DOI :
10.1109/JOE.2003.816674
