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Titolo:
SPONTANEOUS OTOACOUSTIC EMISSIONS IN 2 GECKO SPECIES, GEKKO-GECKO ANDEUBLEPHARIS-MACULARIUS
Autore:
MANLEY GA; GALLO L; KOPPL C;
Indirizzi:
TECH UNIV MUNICH,INST ZOOL,LICHTENBERGSTR 4 D-85747 GARCHING GERMANY
Titolo Testata:
The Journal of the Acoustical Society of America
fascicolo: 3, volume: 99, anno: 1996,
pagine: 1588 - 1603
SICI:
0001-4966(1996)99:3<1588:SOEI2G>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
OUTER HAIR-CELLS; OTO-ACOUSTIC EMISSIONS; NERVE FIBER ACTIVITY; TONOTOPIC ORGANIZATION; ALLIGATOR LIZARD; FORCE GENERATION; BOBTAIL LIZARD; TOKAY GECKO; GUINEA-PIG; TEMPERATURE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
68
Recensione:
Indirizzi per estratti:
Citazione:
G.A. Manley et al., "SPONTANEOUS OTOACOUSTIC EMISSIONS IN 2 GECKO SPECIES, GEKKO-GECKO ANDEUBLEPHARIS-MACULARIUS", The Journal of the Acoustical Society of America, 99(3), 1996, pp. 1588-1603

Abstract

Spontaneous otoacoustic emissions (SPOAE) of the gecko species Gekko gecko and Eublepharis macularius appear as broad spectral peaks (bandwidth 44 to 170 Hz) between 1 and 4.5 Id-It that have peak levels of -7to 10 dB SPL. Most ears showed SPOAE at many frequencies. In some ears, the peaks were superimposed on a broad baseline emission. The instantaneous frequency of any emission varied rapidly within its bandwidthlimits and frequencies in the center of the band occurred most commonly, but not with higher levels than frequencies on the periphery of the band. SPOAE were temperature dependent, rising in frequency with an increase in temperature and falling with a decrease in temperature (rate of change from 54 to 107 Hz/degrees C), with no systematic changes in peak level except that at the temperature extremes, the SPOAE disappeared into the noise. External tones suppressed SPOAE peak level in afrequency-dependent way. Isosuppression tuning curves were V-shaped. In restricted frequency ranges, facilitation also occurred. External tones also caused shifts in the frequency of SPOAE; frequency ''pushing'' was more common than ''pulling. '' The maximal frequency shift observed was 313 Hz. In general, the SPOAE characteristics strongly resemble those already reported in the bobtail lizard Tiliqua rugosa. (C) 1996 Acoustical Society of America.

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Documento generato il 30/11/20 alle ore 03:31:45