Accession Number : ADD018601

Title :   System for Determining an Interior or Exterior Acoustic Noise Level of an Enclosed Structure and Noise Reduction Device Incorporating Such System

Descriptive Note : Patent, filed 31 Oct 95, patented 24 Jun 97

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bucaro, Joseph A ; Houston, Brian H ; Romano, Anthony J

Report Date : 24 Jun 1997

Pagination or Media Count : 11

Abstract : The acoustic noise monitor determines acoustic sound levels radiated or scattered to an exterior or interior fluid space of a structure such as an enclosed structure by measuring a condition, such as strain level of the structure itself rather than by directly measuring the fluid itself. From the strain or other condition measured on the structure, the acoustic sound levels can be calculated with the Helmholtz integral. The sensors on the structure are preferably spaced so that non-radiating high wave-number motions of the structure are averaged out. The acoustic noise monitor can be used with submarines, jet aircraft, cars, or the like.

Descriptors :   *FIBER OPTICS, *ACOUSTIC MEASUREMENT, *ACOUSTIC DETECTORS, *PATENTS, SIGNAL PROCESSING, FOURIER TRANSFORMATION, INTEGRATED SYSTEMS, OPTICAL INTERFEROMETERS, NOISE REDUCTION, ACOUSTIC SCATTERING, MULTIPLEXING, SOUND PRESSURE, ACOUSTIC FIELDS, ACOUSTOOPTICS, RADIATED NOISE, AUTOMOTIVE VEHICLES, JET AIRCRAFT NOISE, PHASE SHIFT, SUBMARINE NOISE, HELMHOLTZ EQUATIONS

Subject Categories : Acoustic Detection and Detectors
      Acoustooptic and Optoacoustic Devices
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE