Accession Number:

ADA101100

Title:

Experimental Study of Noise Produced by an Underwater Acoustic Bubble Screen.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1981-06-01

Pagination or Media Count:

65.0

Abstract:

Measurements in the Naval Postgraduate Schools anechoic water tanks were conducted to determine the acoustic noise in the frequency range twenty hertz to ten kilohertz associated with injecting air into the tank through perforations in a two inch diameter PVC pipe. The effective source level for a pipe having several rows of smaller holes is ten to fifteen decibels smaller over most of the band than for pipe having a single row of holes which produces the same flow rate. The measurements also indicate that the dominant source of noise is that associated with bubble formation and that the second most important source is from ascending bubbles. The impetus for this work was to study various aspects of the problem of designing a sound insulating bubble screen for the Carr Inlet Range of the Puget Sound Naval Shipyard. Author

Subject Categories:

  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE