Filters: Tags: acoustics (X)63 results (11ms)
The RVCAT database contains data that have been collected on various vessel operations on the Great Lakes and select connecting waterways. This section of Reference Tables specifically handles repetitive or standardized information that is called upon in the main tables of the RVCAT database. Reference tables are used in database design in order to standardize often used values and to make the data file efficient. All of the terms defined in the reference tables have been determined by the United States Geological Survey, Great Lakes Science Center and it’s partners.
Acoustical response of phytoplanktonic volume scatterers at ultrasonic frequencies as an indicator of pollution in sea waters
Self-Contained Sector-Scanning Sonar for Bottom Roughness Observations as Part of Sediment Transport Studies
Changes in population size of Scotian shelf euphausiids and silver hake during 1984-1994 measured by multi-frequency acoustics
In this study we describe the design and application of an automated classification system that utilizes artificial intelligence to corroborate the finding that Gunnison's prairie dogs have different alarm calls for different species of predators. This corroboration is strong because it utilizes an entirely different analysis technique than that used in the original research by Slobodchikoff et al. [Slobodchikoff, C.N., Fischer, C., Shapiro, J., 1986. Predator-specific alarm calls of prairie dogs. Am. Zool. 26, 557] or in subsequent study done by Slobodchikoff et al. [Slobodchikoff, C.N., Kiriazis, J., Fischer, C., Creef, E., 1991. Semantic information distinguishing individual predators in the alarm calls of Gunnison's...
Bottlenose dolphins (Tursiops truncatus) increase whistling in the presence of "swim-with-dolphin" tour operations.
Individuality of contact calls in the greater flamingo Phoenicopterus ruber and the problem of background noise in a colony
Ranging by song in Carolina wrens Thryothorus ludovicianus: Effects of environmental acoustics and strength of song degradation
Oceans 98 -- Engineering For Sustainable Use of the Oceans: Conference Proceedings 28 September - 1 October 1998, Nice (France) Volume 1
In this study, we present a methodology that identifies acoustic units in Gunnison's prairie dog alarm calls and then uses those units to classify the alarm calls and bouts according to the species of predator that was present when the calls were vocalized. While traditional methods measure specific acoustic parameters in order to describe a vocalization, our method uses the variation in the internal structure of a vocalization to define possible information structures. Using a simple representation similar to that used in human speech to identify vowel sounds, a software system was developed that uses this representation to recognize acoustic units in prairie dog alarm calls. These acoustic units are then used...