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Titolo:
SPONTANEOUS OTOACOUSTIC EMISSIONS 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: 110, anno: 1997,
pagine: 61 - 76
SICI:
0378-5955(1997)110:1-2<61:SOEITB>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
OUTER HAIR-CELLS; EVOKED ACOUSTIC EMISSIONS; FROG RANA-ESCULENTA; BOBTAIL LIZARD; SOUND LOCALIZATION; BASILAR PAPILLA; TYTO-ALBA; GENERAL-CHARACTERISTICS; COCHLEAR AMPLIFIER; AUDITORY-SYSTEM;
Keywords:
SOAE; OTOACOUSTIC EMISSIONS; FREQUENCY TUNING; SUPPRESSION; BARN OWL; BIRD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
71
Recensione:
Indirizzi per estratti:
Citazione:
G. Taschenberger e G.A. Manley, "SPONTANEOUS OTOACOUSTIC EMISSIONS IN THE BARN OWL", Hearing research, 110(1-2), 1997, pp. 61-76

Abstract

Spontaneous otoacoustic emissions (SOAE) were studied in a bird, the barn owl. They were found in 79% of the ears investigated, and each emitting ear generated on average 1.9 emissions. Their peak sound-pressure levels lay between -5.8 and 10.3 dB, and their centre frequencies between 2.3 and 10.5 kHz. The SOAE originated primarily in the upper quarter of the animal's hearing range, and derived from a specialized area previously described as being within an auditory fovea. Indeed, 93%of the emissions had centre frequencies above 7.5 kHz. The median of the frequency distances between neighbouring SOAE was 406 Hz (0.058 oct). The 3 dB bandwidth of the emissions depended on their amplitude above the noise: for SOAE whose level exceeded 10 dB above the noise floor, the 3 dB bandwidths ranged between 4.5 and 11.4 Hz. SOAE frequencies were temperature sensitive. Raising the temperature shifted the emissions to higher frequencies, and vice versa (the frequency shifted onaverage 0.039 oct/degrees C). External tones could suppress the levelof SOAE, an effect that was highly tuned. For SOAE with frequencies between 2.5 and 10.5 kHz, the Q(10dB) values of 2 dB iso-suppression tuning curves (STC) varied from 1.07 to 10.40. The best thresholds of 2 dB STC were generally below 15 dB SPL.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 14:52:22