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Construction of Spatial Features in Echolocating Bottlenose Dolphins (Tursiops truncatus)
Construction of Spatial Features in Echolocating Bottlenose Dolphins (Tursiops truncatus)
Construction of Spatial Features in Echolocating Bottlenose Dolphins (Tursiops truncatus)

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211152658
ISBN  
9798384480440
DDC  
152
저자명  
Christman, Katie Anna.
서명/저자  
Construction of Spatial Features in Echolocating Bottlenose Dolphins (Tursiops truncatus)
발행사항  
[Sl] : University of California, San Diego, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
131 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
주기사항  
Advisor: Gentner, Timothy.
학위논문주기  
Thesis (Ph.D.)--University of California, San Diego, 2024.
초록/해제  
요약Dolphins use an advanced biosonar system to accurately navigate and forage in their environment. They have the unique capability to rapidly detect and classify underwater targets in a complex acoustic environment and do so more precisely than man-made underwater sonars. Dolphins use the fine-scale temporal and spectral features of the echo-waveforms to determine different attributes of the target and rely on echo-delay, the time between their emitted sound pulse "click" and the return of the reflected echo to determine the range to a target. In this dissertation, phantom echoes are used to determine the effect that changes in mean echo-delay, i.e. range, have on echo-delay discrimination abilities and which fine-scale acoustic features dolphins use to create a coherent mental representation of a target. In Chapter 1, the dolphin's ability to detect changes in echo-delay as a function of range was determined. Chapter 2 then tested the dolphin's ability to discriminate between the ranges of two targets at different mean ranges. In this experiment targets were presented successively, meaning, the dolphin had to hold the range of one target in memory while they compared it to the second target. Chapters 1 and 2 conclude that as mean range increases greater than 10 m the dolphin's ability to discriminate between echo-delays degrades rapidly. Chapter 3 explores the possibility of the dolphin using spectral cues to determine the difference in range between two targets that are presented simultaneously. First, the dolphin's peripheral auditory system was modeled to determine available spectral cues. The dolphin's ability to discriminate the difference in range between two targets was then tested and compared under successive and simultaneous conditions. Although spectral cues were available to the dolphin, the results from the simultaneous condition suggest limited improvement when compared to the successive condition. Lastly, Chapter 4 focuses on the auditory perceived cues the dolphin may use to convert fine-scale spectral and temporal information into a coherent mental representation. By manipulating echo-phase information the results suggest that for fine-scale echo-delays the dolphins may use a pitch cue to discriminate between complex targets.
일반주제명  
Experimental psychology
일반주제명  
Cognitive psychology
일반주제명  
Acoustics
일반주제명  
Behavioral sciences
키워드  
Dolphins
키워드  
Echolocation
키워드  
Target ranging
키워드  
Phantom echoes
키워드  
Mean echo-delays
기타저자  
University of California, San Diego Psychology
기본자료저록  
Dissertations Abstracts International. 86-04B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■035    ▼a(MiAaPQ)AAI31487736
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a152
■1001  ▼aChristman,  Katie  Anna.
■24510▼aConstruction  of  Spatial  Features  in  Echolocating  Bottlenose  Dolphins  (Tursiops  truncatus)
■260    ▼a[Sl]▼bUniversity  of  California,  San  Diego▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a131  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-04,  Section:  B.
■500    ▼aAdvisor:  Gentner,  Timothy.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  San  Diego,  2024.
■520    ▼aDolphins  use  an  advanced  biosonar  system  to  accurately  navigate  and  forage  in  their  environment.  They  have  the  unique  capability  to  rapidly  detect  and  classify  underwater  targets  in  a  complex  acoustic  environment  and  do  so  more  precisely  than  man-made  underwater  sonars.  Dolphins  use  the  fine-scale  temporal  and  spectral  features  of  the  echo-waveforms  to  determine  different  attributes  of  the  target  and  rely  on  echo-delay,  the  time  between  their  emitted  sound  pulse  "click"  and  the  return  of  the  reflected  echo  to  determine  the  range  to  a  target.  In  this  dissertation,  phantom  echoes  are  used  to  determine  the  effect  that  changes  in  mean  echo-delay,  i.e.  range,  have  on  echo-delay  discrimination  abilities  and  which  fine-scale  acoustic  features  dolphins  use  to  create  a  coherent  mental  representation  of  a  target.  In  Chapter  1,  the  dolphin's  ability  to  detect  changes  in  echo-delay  as  a  function  of  range  was  determined.  Chapter  2  then  tested  the  dolphin's  ability  to  discriminate  between  the  ranges  of  two  targets  at  different  mean  ranges.  In  this  experiment  targets  were  presented  successively,  meaning,  the  dolphin  had  to  hold  the  range  of  one  target  in  memory  while  they  compared  it  to  the  second  target.  Chapters  1  and  2  conclude  that  as  mean  range  increases  greater  than  10  m  the  dolphin's  ability  to  discriminate  between  echo-delays  degrades  rapidly.  Chapter  3  explores  the  possibility  of  the  dolphin  using  spectral  cues  to  determine  the  difference  in  range  between  two  targets  that  are  presented  simultaneously.  First,  the  dolphin's  peripheral  auditory  system  was  modeled  to  determine  available  spectral  cues.  The  dolphin's  ability  to  discriminate  the  difference  in  range  between  two  targets  was  then  tested  and  compared  under  successive  and  simultaneous  conditions.  Although  spectral  cues  were  available  to  the  dolphin,  the  results  from  the  simultaneous  condition  suggest  limited  improvement  when  compared  to  the  successive  condition.  Lastly,  Chapter  4  focuses  on  the  auditory  perceived  cues  the  dolphin  may  use  to  convert  fine-scale  spectral  and  temporal  information  into  a  coherent  mental  representation.  By  manipulating  echo-phase  information  the  results  suggest  that  for  fine-scale  echo-delays  the  dolphins  may  use  a  pitch  cue  to  discriminate  between  complex  targets.
■590    ▼aSchool  code:  0033.
■650  4▼aExperimental  psychology
■650  4▼aCognitive  psychology
■650  4▼aAcoustics
■650  4▼aBehavioral  sciences
■653    ▼aDolphins
■653    ▼aEcholocation
■653    ▼aTarget  ranging
■653    ▼aPhantom  echoes
■653    ▼aMean  echo-delays
■690    ▼a0623
■690    ▼a0633
■690    ▼a0986
■690    ▼a0602
■71020▼aUniversity  of  California,  San  Diego▼bPsychology.
■7730  ▼tDissertations  Abstracts  International▼g86-04B.
■790    ▼a0033
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163363▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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