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Titolo:
GENERAL-CHARACTERISTICS AND SUPPRESSION TUNING PROPERTIES OF THE DISTORTION-PRODUCT OTOACOUSTIC EMISSION 2F(1)-F(2) IN THE BARN OWL
Autore:
TASCHENBERGER G; MANLEY GA;
Indirizzi:
TECH UNIV MUNICH,INST ZOOL,LICHTENBERGSTR 4 D-85747 GARCHING GERMANY TECH UNIV MUNICH,INST ZOOL D-85747 GARCHING GERMANY
Titolo Testata:
Hearing research
fascicolo: 1-2, volume: 123, anno: 1998,
pagine: 183 - 200
SICI:
0378-5955(1998)123:1-2<183:GASTPO>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACOUSTIC DISTORTION; BASILAR-MEMBRANE; BOBTAIL LIZARD; HAIR CELL; TYTO-ALBA; MECHANOELECTRICAL TRANSDUCTION; PTERONOTUS-PARNELLII; SOUND LOCALIZATION; 2-TONE DISTORTION; EAR;
Keywords:
DPOAE; OTOACOUSTIC EMISSION; FREQUENCY TUNING; SUPPRESSION; BARN OWL; BIRD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
69
Recensione:
Indirizzi per estratti:
Citazione:
G. Taschenberger e G.A. Manley, "GENERAL-CHARACTERISTICS AND SUPPRESSION TUNING PROPERTIES OF THE DISTORTION-PRODUCT OTOACOUSTIC EMISSION 2F(1)-F(2) IN THE BARN OWL", Hearing research, 123(1-2), 1998, pp. 183-200

Abstract

The distortion-product otoacoustic emission (DPOAE) 2f(1)-f(2) was measured in the ear canal of the barn owl. DPOAE were elicited by primary tones in 11 frequency regions from 1 to 9 kHz. The highest DPOAE output levels and best thresholds were found for f(1) frequencies of 4 to7 kHz and additionally at the lowest f(1) frequency investigated. In some cases, the DPOAE sound pressures were only 37 dB below the primary-tone levels (PTL). The optimal primary-tone frequency ratios ranged from 1.05 to 1.45 and varied strongly among the different frequency regions investigated. The largest optimal ratios were measured in the middle frequency range for f(1). At lower and higher f(1), the optimal ratios decreased. DPOAE levels could be suppressed in a frequency-selective way by adding a third tone. As in other non-mammals, the best suppressive frequencies were near f(1), suggesting DPOAE generation near the frequency place of this primary tone. This is in contrast to what is known for mammalian species, where the DPOAE is thought to be generated near f(2). To obtain 6 dB of suppression of the DPOAE level, suppressor-tone levels ranging from 13 dB below to 4 dB above the primary-tone level were necessary. The Q(10dB)-values of suppression tuning curves increased as a function of frequency up, to a value of 15.8. Thistendency resembled the increase in frequency selectivity of auditory nerve fibers in this species. (C) 1998 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 06:05:46