Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 175 for “"Vocalizations"”.
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Acoustical analyses of chicken vocalizations
Vocalizations of the domestic chicken were recorded and analyzed by quantitative and qualitative methods in two experiments. In Experiment 1, recordings were made from males and females from two lines of White Leghorn chickens housed in individual battery cages. Five call types: crow, disturbance …
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The Physics of Rodent Ultrasonic Vocalizations
… much work has been done on the physics of vocalizations caused by the vibrating motion of vocal folds, relatively little work has been done on the physics of ultrasonic vocalizations (USVs). There are two orders of mammals known to make these kind of vocalizations: cetaceans and rodents. Of …
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Aggressive vocalizations in feeding guanacos, Lama guanicoe
… exhibit subtle threat displays and aggressive vocalizations when feeding. Although studies have qualitatively described aggressive vocalizations, the causation and functional significance of aggressive vocalizations in feeding guanacos are poorly understood. In the General Introduction, I …
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Analysis of exotic cat vocalizations and middle-ear properties
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
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Characteristics, contexts, and possible functions of the vocalizations of Blue Jays
… Jays at 17 different locations, recorded their vocalizations, and noted the behavioral contexts during which calls were uttered. I also conducted playback experiments with four different Blue Jay calls and with the calls of several species of raptors to provide additional contexts that might …
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The responsivity of neonatal chicks to conspecific distress and contentment vocalizations
… same-age, conspecific distress and contentment vocalizations over the first several days of post-hatch life. Three hundred forty-eight White Leghorn chicks from either a sample of the Cornell Randombred or Athens Canadian x Cornell Randombred population were tested at 24, 48, 72, 96, and/or 144 …
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The vocalizations and syringeal anatomy of the common crow, Corvus brachyrhynchos
A study of the vocalizations and syringeal anatomy of the common crow was conducted between 1964 and 1966. Intensive documentation of the sounds produced by the common crow, related to the appropriate behavioral context in which each sound occurs in the wild, was the primary objective of this …
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Relating behavioral context to acoustic parameters of bottlenose dolphin (Tursiops truncatus) vocalizations
… presents methods to analyze the function of vocalizations of the bottlenose dolphin, Tursiops truncatus. The thesis uses the social interaction as the basic unit of analysis, and maintains a deliberate focus on quantitative and replicable analyses throughout. A method for determining identity …
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Acoustic-phonetic analysis of the prespeech vocalizations of babies with cleft palate
… means of investigating the prespeech vocalizations of babies with cleft palate. Because prespeech vocalizations appear to play an important role in the acquisition of language, it is vital to have a means of identifying these vocalizations beyond the phonemic inventory which omits …
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Relating behavioral context to acoustic parameters of bottlenose dolphin (Tursiops truncatus) vocalizations
… presents methods to analyze the function of vocalizations of the bottlenose dolphin, Tursiops truncatus. The thesis uses the social interaction as the basic unit of analysis, and maintains a deliberate focus on quantitative and replicable analyses throughout. A method for determining identity …
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Comparative study of the vocalizations and singing behavior of four Aimophila sparrows
Vocalizations and singing behaviors of Rufous-crowned Sparrows, Rufous-winged Sparrows, and Cassin's Sparrows were analyzed, described, and compared. For comparative purposes, data from previously studied Five-striped Sparrows were also included. Ten, 5, 3, and 6 types of calls were present in the …
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Increasing Novel Vocalizations for Individuals with ASD Using a Voice Output Communication Aide
… vocal speech. All three participants increased vocalizations, but to varying degrees and only after a second phase where an echoic prompt was introduced. While the results vary across participants, increased vocal speech for all participants and high social validity suggest that VOCA-based …
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SEASONAL CHANGES IN BLACK-CAPPED CHICKADEE (POECILE ATRICAPILLUS) SOCIAL STRUCTURE AND GARGLE VOCALIZATIONS
… affiliations for long periods of time. In birds, vocalizations are the main means of communicating among individuals. When there are multiple groups of birds in an area, each group could share vocalizations. This sharing can then create local dialects. Black-capped chickadees (<em>Poecile …
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Flight Vocalizations and Displays of Adult Chimney Swifts (Chaetura Pelagica): Description and Function
<p>The vocalizations of many songbirds have been well documented and analyzed, but less is known about the vocal behavior of many non-passerines, including swifts. While flying alone as well as during aerial displays with conspecifics, Chimney Swifts (Chaetura pelagica) often utter a twitter call …
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Vocalizations influence roost-site selection in overwintering cavity-nesting birds in Eastern Washington
… study asks if timing of roost site selection and vocalizations influence the frequency and flock size of cavity- nesting birds inspecting roosting sites and if flock size varies with temperature. The study was conducted during the winters of 2016-17 and 2017-18 on Turnbull National Wildlife …
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Beyond words: Understanding emotional shifts in maternal vocalizations through speech emotion recognition models
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Neural mechanisms underlying the emergence of rhythmic and stereotyped vocalizations in juvenile songbirds
Complex motor behaviors in humans, such as speech, are not innate, but instead are learned. How does the brain construct neural circuits that generate these motor behaviors during learning? To understand the neural mechanisms underlying learned motor skills, I use vocal learning in songbirds as a …
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