Sonar system and method providing low probability of impact...

Communications – electrical: acoustic wave systems and devices – Transmitter systems

Reexamination Certificate

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Reexamination Certificate

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07486591

ABSTRACT:
Low probability of marine mammal impact (LPMMI) sound signals have a modulation component selected to reduce a behavioral response from a marine mammal from that which would occur when transmitting another sound signal having approximately the same time duration component, approximately the same bandwidth component, and approximately the same center frequency component as the LPMMI waveform but having a modulation component comprising a frequency modulation.

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National Oceanic and Atmospheric Administration, et al., “Small Takes of Marine Mammals Incidental to Specified Activities; Marine Seismic Survey in the Gulf of Alaska, Northeastern Pacific Ocean”, Federal Register, vol. 69, No. 120, Jun. 23, 2004, pp. 34996-35011.
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Xiang et al.; “Fast M-sequence Transform for Quasi-Backscatter Sonar in Fisheries and Zooplanton Survey Applications;” 2004 7th International Conference on Signal Processing Proceedings); Aug. 2004; XP002422307; ISBN: 0-7803-8406-7; pp. 2433-4236.
PCT Search Report and Written Opinion for PCT Application No. PCT/US2006/039686; dated Mar. 13, 2007.

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