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Titolo:
SOUND LOCALIZATION IN CHINCHILLAS .2. FRONT BACK AND VERTICAL LOCALIZATION/
Autore:
HEFFNER RS; HEFFNER HE; KOAY G;
Indirizzi:
UNIV TOLEDO,DEPT PSYCHOL TOLEDO OH 43606
Titolo Testata:
Hearing research
fascicolo: 1-2, volume: 88, anno: 1995,
pagine: 190 - 198
SICI:
0378-5955(1995)88:1-2<190:SLIC.F>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPECTRAL CUES; BINAURAL LOCALIZATION; HEARING CONDITIONS; AUDITORY SPACE; ACUITY; CAT; TOPOGRAPHY; FREQUENCY; PINNA;
Keywords:
PINNA; ELEVATION; MONAURAL CUE; NOISE BAND; ULTRASOUND; EVOLUTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
R.S. Heffner et al., "SOUND LOCALIZATION IN CHINCHILLAS .2. FRONT BACK AND VERTICAL LOCALIZATION/", Hearing research, 88(1-2), 1995, pp. 190-198

Abstract

The ability of chinchillas to make front/back and vertical locus discriminations was examined behaviorally using a conditioned avoidance procedure. Their minimum audible angle for localizing single broadband noise bursts was 36 degrees for front/back localization and 23 degrees for vertical localization. Sound localization tests using filtered noise demonstrated that the signal must contain high frequencies in orderfor chinchillas to make front/back and vertical locus judgements and that frequencies in their highest audible octave (i.e., above 16 kHz) contribute to localization. These results support the view that a major selective advantage of high-frequency hearing in mammalian evolutionwas its utility for monaural as well as binaural sound localization.

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Documento generato il 06/12/20 alle ore 00:04:20