Accession Number : ADA011110


Title :   Vertical Directionality of Noise and Signal Transmissions During Operation Church Anchor


Descriptive Note : Summary rept.


Corporate Author : SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB


Personal Author(s) : Anderson, Victor C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a011110.pdf


Report Date : 15 Nov 1974


Pagination or Media Count : 59


Abstract : A vertical array of 20 vibration isolated hydrophones was suspended from the Research Platform FLIP at various depths from 713m to 4816m. Preformed sets of beams were formed with a digital beamformer to observe the vertical noise distribution at three to four frequencies between 20 and 100 Hz. Directional spectra derived from 10 minutes samples of digital records are presented. Several contour plots of amplitude distributions are also shown for both signal and noise records.


Descriptors :   *UNDERWATER SOUND , POWER SPECTRA , DEPTH , BEAM FORMING , BACKGROUND NOISE , SUPERLOW FREQUENCY , STABILIZED PLATFORMS , HYDROPHONES , AMBIENT NOISE , SOUND PRESSURE


Subject Categories : Acoustic Detection and Detectors
      Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE