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Titolo:
Sound localization in an old-world fruit bat (Rousettus aegyptiacus): Acuity, use of binaural cues, and relationship to vision
Autore:
Heffner, RS; Koay, G; Heffner, HE;
Indirizzi:
Univ Toledo, Dept Psychol, Toledo, OH 43606 USA Univ Toledo Toledo OH USA43606 oledo, Dept Psychol, Toledo, OH 43606 USA
Titolo Testata:
JOURNAL OF COMPARATIVE PSYCHOLOGY
fascicolo: 3, volume: 113, anno: 1999,
pagine: 297 - 306
SICI:
0735-7036(199909)113:3<297:SLIAOF>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTERAURAL TIME DIFFERENCES; SUPERIOR OLIVARY COMPLEX; GANGLION-CELLS; HEARING; RATS; ECHOLOCATION; SENSITIVITY; CHIROPTERA; ECOLOGY; PREY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Heffner, HE Univ Toledo, Dept Psychol, Toledo, OH 43606 USA Univ Toledo Toledo OH USA 43606 Psychol, Toledo, OH 43606 USA
Citazione:
R.S. Heffner et al., "Sound localization in an old-world fruit bat (Rousettus aegyptiacus): Acuity, use of binaural cues, and relationship to vision", J COM PSYCH, 113(3), 1999, pp. 297-306

Abstract

The passive sound-localization acuity of Egyptian fruit bats (Rousettus aegyptiacus) was determined using a conditioned-avoidance procedure. The meanminimum audible angle for left-right discrimination for 3 bats was 11.6 degrees-very near the mean for terrestrial mammals. The bats also were able to localize low- and high-frequency pure tones, indicating that they can useboth binaural phase-difference and binaural intensity-difference cues to localize sound. Moreover, they were able to use the binaural phase-difference cue up to at least 5.6 kHz, which is higher than other mammals yet tested. The width of the Egyptian fruit bats' field of best vision was 27 degrees. This value is consistent with the hypothesis that the role of passive sound localization is to direct the eyes for visual scrutiny of sound sources. Thus, the passive localization abilities of these echolocating megachiropteran fruit bats do not deviate from the patterns established for nonecholocating mammals.

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Documento generato il 24/10/20 alle ore 11:49:52