Single hydrophone technique for obtaining spectral source levels of marine mammals in coastal waters
MetadataShow full item record
During the annual Gray Whale migration from the Aleutians to Baja California, the mammals travel in coastal waters, thereby presenting an opportunity for the study of their sound spectral and source levels and vocabulary. However, such measurements are distorted by surface and bottom reverberation. Using the theory of rough surface scattering, knowledge of the bottom impedance, and correlation techniques, it is possible to decompose the shallow water reverberation into the contributions from different paths. From this, the range, depth and the deverberated spectral source levels of the sounds of the mammal can be determined by use of only one hydrophone rather than the conventional three or four. The theory, deverberation programming, and experimental results are presented for a model of the whale's pulsed radiation in a laboratory model coastal environment
Showing items related by title, author, creator and subject.
Choi, Seong Hwan (1983);Military personnel encounter a variety of noise environments. During exercises, high intensity noise levels are often encountered. 24 subjects were required to respond to symbols presented under two levels of task ...
De la Torre, Luis V. (Monterey, California. Naval Postgraduate School, 2008-06);Police officers working in countries plagued by drug trafficking are often offered a choice between "plata o plomo" ("silver or lead"). Given this option, it is not surprising that levels of police corruption are high in ...
Lazzaretti, Patrick C. (Monterey, California: Naval Postgraduate School, 2008-12);Human Systems Integration (HSI) is a process designed to reduce life-cycle costs and improve system performance by considering human-related domains. Acquisition specialists lack objective, quantitative research findings ...