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Titolo:
AUDIOGRAM OF THE BIG BROWN BAT (EPTESICUS-FUSCUS)
Autore:
KOAY G; HEFFNER HE; HEFFNER RS;
Indirizzi:
UNIV TOLEDO,DEPT PSYCHOL TOLEDO OH 43606
Titolo Testata:
Hearing research
fascicolo: 1-2, volume: 105, anno: 1997,
pagine: 202 - 210
SICI:
0378-5955(1997)105:1-2<202:AOTBBB>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOUND PRESSURE TRANSFORMATION; AUDITORY-CORTEX; FREQUENCY DISCRIMINATION; ECHOLOCATING BATS; EXTERNAL EAR; HEARING; SENSITIVITY; LOCALIZATION; PINNA; CAT;
Keywords:
CHIROPTERA; EVOLUTION; HEARING; MAMMAL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
39
Recensione:
Indirizzi per estratti:
Citazione:
G. Koay et al., "AUDIOGRAM OF THE BIG BROWN BAT (EPTESICUS-FUSCUS)", Hearing research, 105(1-2), 1997, pp. 202-210

Abstract

The audiograms of three big brown bats (Eptesicus fuscus) were determined using a conditioned avoidance procedure. The average audiogram ranged from 0.850 kHz at 106 dB to 120 kHz at 83 dB SPL, with a best threshold of 7 dB at 20 kHz and a distinct decrease in sensitivity at 45 kHz. The results confirm those of a previous study by Dalland (1965a) that the big brown bat has good high-frequency hearing coupled with poor low-frequency hearing. Comparative analysis suggests that the bat'sgood high-frequency hearing initially evolved for passive sound localization and that it was later coopted for use in echolocation. In addition, the restricted low-frequency hearing of the big brown bat is typical of mammals with good high-frequency hearing.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 23:38:24