Accession Number : ADA610200


Title :   Bioacoustic Absorption Spectroscopy (ASIAEX)


Descriptive Note : Annual rept.


Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC ACOUSTICS DIV


Personal Author(s) : Diachok, Orest


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a610200.pdf


Report Date : 30 Sep 2000


Pagination or Media Count : 8


Abstract : The long-term goal is to demonstrate the potential of bioacoustic absorption spectroscopy for tomographic mapping of the bioacoustic parameters of fish with swim bladders in shallow water in the context of the ONR ASIAEX Program. The objective is to develop a propagation model that accounts for the effects of bioacoustic absorptivity on transmission loss in shallow water at frequencies between 0.2 and 10.0 kHz. Develop a bioacoustic model that accounts for the resonance frequencies of absorption lines, which are due to dispersed pelagic fish, and schools of pelagic fish with swim bladders. Demonstrate consistency between absorptivity and echo sounder based estimates of number densities.


Descriptors :   *ABSORPTION SPECTRA , *BIOACOUSTICS , *SPECTROSCOPY , BROADBAND , FISHES , MAPPING , MODELS , PROPAGATION , RESONANT FREQUENCY , SHALLOW WATER , TOMOGRAPHY , TRANSMISSION LOSS


Subject Categories : Biological Oceanography
      Acoustics
      Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE