Modeling and frequency tracking of marine mammal whistle calls
MetadataShow full item record
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. Different fundamental frequency watermarking schemes are proposed based on their ability to produce natural sounding synthetic whistles and yield suitable watermark detection and retrieval.
Submitted in partial fulfillment of the requirements for the degree of Master of Science at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution February 2009
Suggested CitationThesis: Severson, Jared, "Modeling and frequency tracking of marine mammal whistle calls", 2009-02, DOI:10.1575/1912/2708, https://hdl.handle.net/1912/2708
Showing items related by title, author, creator and subject.
Watkins, William A.; Daher, Mary Ann; Haley, Nancy J. (Woods Hole Oceanographic Institution, 1990-06)This documentation for the CETACEA database of marine mammal literature references updates and expands the original work by Watkins, Bird, Moore, and Tyack 1988 (Reference Database Marine Mammal Literature, Technical ...
Watkins, William A.; Bird, James E.; Moore, Karen E.; Tyack, Peter L. (Woods Hole Oceanographic Institution, 1988-01)A comprehensive Reference Database has been designed for the marine mammal literature. The system uses INMAGIC programming (Cambridge, MA) to file, store, search, retrieve, and format the data records. The database was ...
Pugliares, Katie R.; Bogomolni, Andrea L.; Touhey, Kathleen M.; Herzig, Sarah M.; Harry, Charles T.; Moore, Michael J. (Woods Hole Oceanographic Institution, 2007-09)This necropsy manual is designed to establish a base level of profiency in marine mammal necropsy techniques. It is written for stranding network members who do not have a formal pathobiological training and have limited ...