The Sonar of DolphinsSpringer Science & Business Media, 6 dic 2012 - 278 pagine Over the ages, humans have always been fasci manner and to present a comprehensive and nated by dolphins. This fascination heightened in organized treatise on the subject. In my opinion, the 1950s when oceanariums and aquariums such an effort is long overdue, since there is a paucity of books on this subject. I know of only began to use dolphins as show performers to one booklet and one book dealing with echoloca demonstrate their prowess and display how tractable and trainable they were. The televi tion in dolphins. I have attempted to introduce as many concepts from physics as possible sion series "Flipper" brought considerable public awareness and, coupled with the growing sophis and also to create mathematical models as an aid to the quantification and understanding of tication and popularity of dolphin shows, helped to further heighten public interest in these intri biosonar capabilities. Topics are covered which guing marine mammals. Soon the alluring but range from auditory pathways and processes, to anatomy of the dolphin's head, to signal pro unfounded myth began to surface that dolphins cessing models, to a comparison of the sonar of are the smartest of animals, with an intelligence approaching and perhaps surpassing that of bats and dolphins. humans. |
Sommario
1 | |
Derivation of the Receiving Directivity Index | 54 |
The Sonar Signal Transmission System | 77 |
Characteristics of the Transmission System | 98 |
Characteristics of Dolphin Sonar Signals | 115 |
Target Detection Capability of the Active Sonar System | 140 |
Biosonar Discrimination Recognition and Classification | 177 |
Signal Processing and Signal Processing Models | 216 |
59 | 228 |
70 | 234 |
Comparison Between the Sonar of Bats and Dolphins | 242 |
Road Map for Future Research | 266 |
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100 FREQUENCY KHZ acoustic energy aluminum cylinder amplitude angle Animal Sonar Systems animal's approximately auditory auditory system average axis bandwidth bats beam pattern Bel'kovich beluga biosonar bottlenose dolphin broadband capability Cephalorhynchus cetaceans click interval click train clutter screen correct detection correct response cues curve detection threshold directivity index dolphin sonar signals dolphin's performance Dubrovskiy duration echolocation emitted energy flux density Eptesicus equation Evans false killer whale filter frequency spectrum function Heptuna highlights hoop hydrophone Kaneohe Bay masking noise melon nasal plug noise level number of clicks Pawloski peak frequency Penner phin Phocoena plane Plenum Press porpoise Pseudorca pulses quency received relative reverberation shown in Figure signal-to-noise ratio signals measured sound production source level spectral sphere stimulus target detection target echo target range target strength tion transducer trials Turl Tursiops truncatus velocity vertical wall thickness wave waveform whale µPa