Use of Quadratic Time-Frequency Representations to Analyze Cetacean Mammal Sounds
Abstract
The research presented in this report outlines the time-frequency characterization of mammalian click and whistle sounds. Analysis of the group delay structure of the mammalian vocal communication signals was matched to the appropriate quadratic time-frequency class for proper signal processing with minimal skewing of the results. The presented material includes a discussion of the recorded mammalian data recordings from the Woods Hole Oceanographic Institution, and a mathematical introduction into quadratic time-frequency classes, properties, and mathematical structure. This report determines the computational formulations appropriate for analyzing underwater mammalian vocal sounds using quadratic time-frequency representations. Once the proper quadratic time-frequency representations were identified for use in the analysis of clicks and whistles, a large selection of sound files was analyzed to characterize the time-frequency structure. The time duration and bandwidth of the clicks and whistles of various genera of dolphins and whales are presented in this report.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 20, 2001
- Accession Number
- ADA400072
Entities
People
- Antonia Papandreou-suppappola
- Lynn T. Antonelli
Organizations
- Naval Undersea Warfare Center