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- W2057465290 abstract "The West Indian manatee (Trichechus manatus latirostris) has become endangered partly because of watercraft collisions in Florida’s coastal waterways. To reduce the number of collisions, warning systems based upon detecting manatee vocalizations have been proposed. One aspect of the feasibility of an acoustically based warning system relies upon the distance at which a manatee vocalization is detectable. Assuming a mixed spreading model, this paper presents a theoretical analysis of the system detection capabilities operating within various background and watercraft noise conditions. This study combines measured source levels of manatee vocalizations with the modeled acoustic properties of manatee habitats to develop a method for determining the detection range and hydrophone spacing requirements for acoustic based manatee avoidance technologies. In quiet environments (background noise ≈70dB) it was estimated that manatee vocalizations are detectable at approximately 250m, with a 6dB detection threshold. In louder environments (background noise ≈100dB) the detection range drops to 2.5m. In a habitat with 90dB of background noise, a passing boat with a maximum noise floor of 120dB would be the limiting factor when it is within approximately 100m of a hydrophone. The detection range was also found to be strongly dependent on the manatee vocalization source level." @default.
- W2057465290 created "2016-06-24" @default.
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- W2057465290 date "2006-07-01" @default.
- W2057465290 modified "2023-10-14" @default.
- W2057465290 title "Theoretical detection ranges for acoustic based manatee avoidance technology" @default.
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- W2057465290 doi "https://doi.org/10.1121/1.2203597" @default.
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