The identification of Dungeness crab from the power spectral density function of their acoustic signature Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/fq977x69h

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  • The power spectral density of the acoustic signature of Dungeness crab was calculated by the use of digital computer. The signal produced by the Dungeness crab was an analog signal. Therefore a conversion of the signal from analog to digital was necessary. This was done by sampling the acoustic signature of the crab at a rate of 100 KHZ, using an EAI-690 computer. The randomness of the crab signature made it necessary to employ statistical methods. The ensemble average of the acoustic signature of the Dungeness crab was used to calculate the mean spectrum for large and small male and female crabs. A significant concentration of energy was shown in the range of 3, 000 to 4, 000 Hertz for large male and female and small male crabs with smaller adjacent side bands. The range of these side bands was 300 to 500 Hertz. The mean spectrum for small female crab has almost constant concentration of energy in the range of 1, 000 to 6, 000 Hertz. The large male crabs also have a very significant concentration of spectral energy in the range of 600 to 1, 000 Hertz.
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  • File scanned at 300 ppi (Monochrome) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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  • description.provenance : Submitted by Georgeann Booth (gbscannerosu@gmail.com) on 2013-12-11T23:13:00Z No. of bitstreams: 1 EghbaliHassan1974.pdf: 547167 bytes, checksum: 5a745293db8e0eacd87580b204af2cc3 (MD5)
  • description.provenance : Approved for entry into archive by Kirsten Clark(kcscannerosu@gmail.com) on 2013-12-26T19:54:53Z (GMT) No. of bitstreams: 1 EghbaliHassan1974.pdf: 547167 bytes, checksum: 5a745293db8e0eacd87580b204af2cc3 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-12-12T15:43:36Z (GMT) No. of bitstreams: 1 EghbaliHassan1974.pdf: 547167 bytes, checksum: 5a745293db8e0eacd87580b204af2cc3 (MD5)
  • description.provenance : Made available in DSpace on 2013-12-26T19:54:53Z (GMT). No. of bitstreams: 1 EghbaliHassan1974.pdf: 547167 bytes, checksum: 5a745293db8e0eacd87580b204af2cc3 (MD5) Previous issue date: 1974-05-03

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