Spatial orientation of different frequencies within the echolocation beam of a Tursiops truncatus and Pseudorca crassidens

Stuart Ibsen, Paul E. Nachtigall, Jacqueline Krause-Nehring, Laura Kloepper, Marlee Breese, Songhai Li, Stephanie Vlachos

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A two-dimensional array of 16 hydrophones was created to map the spatial distribution of different frequencies within the echolocation beam of a Tursiops truncatus and a Pseudorca crassidens. It was previously shown that both the Tursiops and Pseudorca only paid attention to frequencies between 29 and 42 kHz while echolocating. Both individuals tightly focused the 30 kHz frequency and the spatial location of the focus was consistently pointed toward the target. At 50 kHz the beam was less focused and less precisely pointed at the target. At 100 kHz the focus was often completely lost and was not pointed at the target. This indicates that these individuals actively focused the beam toward the target only in the frequency range they paid attention to. Frequencies outside this range were left unfocused and undirected. This focusing was probably achieved through sensorimotor control of the melon morphology and nasal air sacs. This indicates that both morphologically different species can control the spatial distribution of different frequency ranges within the echolocation beam to create consistent ensonation of desired targets.

Original languageEnglish (US)
Pages (from-to)1213-1221
Number of pages9
JournalJournal of the Acoustical Society of America
Volume132
Issue number2
DOIs
StatePublished - Aug 1 2012
Externally publishedYes

Fingerprint

spatial distribution
frequency ranges
hydrophones
air
Spatial Distribution
Sensorimotor
Air
Nasal

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

Cite this

Spatial orientation of different frequencies within the echolocation beam of a Tursiops truncatus and Pseudorca crassidens. / Ibsen, Stuart; Nachtigall, Paul E.; Krause-Nehring, Jacqueline; Kloepper, Laura; Breese, Marlee; Li, Songhai; Vlachos, Stephanie.

In: Journal of the Acoustical Society of America, Vol. 132, No. 2, 01.08.2012, p. 1213-1221.

Research output: Contribution to journalArticle

Ibsen, Stuart ; Nachtigall, Paul E. ; Krause-Nehring, Jacqueline ; Kloepper, Laura ; Breese, Marlee ; Li, Songhai ; Vlachos, Stephanie. / Spatial orientation of different frequencies within the echolocation beam of a Tursiops truncatus and Pseudorca crassidens. In: Journal of the Acoustical Society of America. 2012 ; Vol. 132, No. 2. pp. 1213-1221.
@article{632ff31dc4884aca98a0483e2e061069,
title = "Spatial orientation of different frequencies within the echolocation beam of a Tursiops truncatus and Pseudorca crassidens",
abstract = "A two-dimensional array of 16 hydrophones was created to map the spatial distribution of different frequencies within the echolocation beam of a Tursiops truncatus and a Pseudorca crassidens. It was previously shown that both the Tursiops and Pseudorca only paid attention to frequencies between 29 and 42 kHz while echolocating. Both individuals tightly focused the 30 kHz frequency and the spatial location of the focus was consistently pointed toward the target. At 50 kHz the beam was less focused and less precisely pointed at the target. At 100 kHz the focus was often completely lost and was not pointed at the target. This indicates that these individuals actively focused the beam toward the target only in the frequency range they paid attention to. Frequencies outside this range were left unfocused and undirected. This focusing was probably achieved through sensorimotor control of the melon morphology and nasal air sacs. This indicates that both morphologically different species can control the spatial distribution of different frequency ranges within the echolocation beam to create consistent ensonation of desired targets.",
author = "Stuart Ibsen and Nachtigall, {Paul E.} and Jacqueline Krause-Nehring and Laura Kloepper and Marlee Breese and Songhai Li and Stephanie Vlachos",
year = "2012",
month = "8",
day = "1",
doi = "10.1121/1.4730900",
language = "English (US)",
volume = "132",
pages = "1213--1221",
journal = "Journal of the Acoustical Society of America",
issn = "0001-4966",
publisher = "Acoustical Society of America",
number = "2",

}

TY - JOUR

T1 - Spatial orientation of different frequencies within the echolocation beam of a Tursiops truncatus and Pseudorca crassidens

AU - Ibsen, Stuart

AU - Nachtigall, Paul E.

AU - Krause-Nehring, Jacqueline

AU - Kloepper, Laura

AU - Breese, Marlee

AU - Li, Songhai

AU - Vlachos, Stephanie

PY - 2012/8/1

Y1 - 2012/8/1

N2 - A two-dimensional array of 16 hydrophones was created to map the spatial distribution of different frequencies within the echolocation beam of a Tursiops truncatus and a Pseudorca crassidens. It was previously shown that both the Tursiops and Pseudorca only paid attention to frequencies between 29 and 42 kHz while echolocating. Both individuals tightly focused the 30 kHz frequency and the spatial location of the focus was consistently pointed toward the target. At 50 kHz the beam was less focused and less precisely pointed at the target. At 100 kHz the focus was often completely lost and was not pointed at the target. This indicates that these individuals actively focused the beam toward the target only in the frequency range they paid attention to. Frequencies outside this range were left unfocused and undirected. This focusing was probably achieved through sensorimotor control of the melon morphology and nasal air sacs. This indicates that both morphologically different species can control the spatial distribution of different frequency ranges within the echolocation beam to create consistent ensonation of desired targets.

AB - A two-dimensional array of 16 hydrophones was created to map the spatial distribution of different frequencies within the echolocation beam of a Tursiops truncatus and a Pseudorca crassidens. It was previously shown that both the Tursiops and Pseudorca only paid attention to frequencies between 29 and 42 kHz while echolocating. Both individuals tightly focused the 30 kHz frequency and the spatial location of the focus was consistently pointed toward the target. At 50 kHz the beam was less focused and less precisely pointed at the target. At 100 kHz the focus was often completely lost and was not pointed at the target. This indicates that these individuals actively focused the beam toward the target only in the frequency range they paid attention to. Frequencies outside this range were left unfocused and undirected. This focusing was probably achieved through sensorimotor control of the melon morphology and nasal air sacs. This indicates that both morphologically different species can control the spatial distribution of different frequency ranges within the echolocation beam to create consistent ensonation of desired targets.

UR - http://www.scopus.com/inward/record.url?scp=84865084426&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84865084426&partnerID=8YFLogxK

U2 - 10.1121/1.4730900

DO - 10.1121/1.4730900

M3 - Article

C2 - 22894240

AN - SCOPUS:84865084426

VL - 132

SP - 1213

EP - 1221

JO - Journal of the Acoustical Society of America

JF - Journal of the Acoustical Society of America

SN - 0001-4966

IS - 2

ER -