|Range ambiguity and pulse interval jitter in the bottlenose dolphin|
Kadane, J.; Penner, R. (1983). Range ambiguity and pulse interval jitter in the bottlenose dolphin. J. Acoust. Soc. Am. 74(3): 1059-1061
In: The Journal of the Acoustical Society of America. American Institute of Physics: New York, etc. ISSN 0001-4966, more
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A common problem of pulse-mode sonar systems which utilize range gating is the range ambiguity caused by echoes from objects at multiple distances returning simultaneously. Research conducted at the Naval Ocean Systems Center, Oahu, Hawaii, investigating bottlenose dolphin echolocation indicate that there is adequate varying of consecutive interpulse intervals (jittering of the repetition rate) to eliminate range ambiguity and range-ambiguous interference in this biological sonar system.