Modeling and frequency tracking of marine mammal whistle calls
dc.contributor.author | Severson, Jared | |
dc.date.accessioned | 2012-03-14T17:41:29Z | |
dc.date.available | 2012-03-14T17:41:29Z | |
dc.date.issued | 2009-02 | |
dc.identifier.uri | https://hdl.handle.net/10945/4301 | |
dc.description | CIVINS (Civilian Institutions) Thesis document | en_US |
dc.description.abstract | Marine mammal whistle calls present an attractive medium for covert underwater communications. High quality models of the whistle calls are needed in order to synthesize natural-sounding whistles with embedded information. Since the whistle calls are composed of frequency modulated harmonic tones, they are best modeled as a weighted superposition of harmonically related sinusoids. Previous research with bottlenose dolphin whistle calls has produced synthetic whistles that sound too clean for use in a covert communications system. Due to the sensitivity of the human auditory system, watermarking schemes that slightly modify the fundamental frequency contour have good potential for producing natural-sounding whistles embedded with retrievable watermarks. Structured total least squares is used with linear prediction analysis to track the time-varying fundamental frequency and harmonic amplitude contours throughout a whistle call. Simulation and experimental results demonstrate the capability to accurately model bottlenose dolphin whistle calls and retrieve embedded information from watermarked synthetic whistle calls. | en_US |
dc.description.uri | http://archive.org/details/modelingndfreque109454301 | |
dc.format.extent | 107 p. : ill. | en_US |
dc.language.iso | en_US | |
dc.publisher | Monterey California. Naval Postgraduate School | en_US |
dc.rights | This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. | en_US |
dc.subject.lcsh | Aquatic animals | en_US |
dc.subject.lcsh | Hearing | en_US |
dc.subject.lcsh | Mammals | en_US |
dc.subject.lcsh | Dolphins | en_US |
dc.title | Modeling and frequency tracking of marine mammal whistle calls | en_US |
dc.type | Thesis | en_US |
dc.contributor.corporate | Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution. | |
dc.description.funder | Contract number: N62271-97-G-0026. | en_US |
dc.description.funder | CIVINS | en_US |
dc.identifier.oclc | 3144 | |
etd.thesisdegree.grantor | Cambridge, Massachusetts : Massachusetts Institute of Technology (MIT) | en_US |
etd.thesisdegree.grantor | Woods Hole Oceanographic Institution | en_US |
etd.verified | no | en_US |
dc.description.distributionstatement | Approved for public release; distribution is unlimited. |
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3. CIVINS (Civilian Institutions) Theses and Dissertations