High-frequency tone-pip-evoked otoacoustic emissions in chinchillas

Jonathan H Siegel, Karolina K. Charaziak

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

We measured otoacoustic emissions in anesthetized chinchillas evoked by short (1 ms) high-frequency (4 kHz) tone-pips (TEOAE) using either a compression or suppression method to separate the stimulus from the emission. Both methods revealed consistent features of the TEOAEs. The main spectral band of the emission generally corresponded to the spectrum of the stimulus, exhibiting a group delay similar to that of SFOAEs [9]. However, a second spectral band below 1.5 kHz, clearly separated from the low-frequency cut-off frequency of the stimulus spectrum, corresponded to an amplitude modulation of the waveform of the TEOAE. The group delay of this low-frequency band was similar to that of the main band near the probe frequency. The average level and group delay of the main band declined monotonically when revealed as the suppressor frequency was raised above the probe. The low-frequency band was more sensitive than the main band to shifts in compound action potential thresholds near the probe frequency induced by acute exposure to intense tones. Taken together, the experiments indicate that both the main and low-frequency bands of the TEOAE are generated primarily near the cochlear region maximally stimulated by the probe, but that significant contributions arise over a large region even more basal.

Original languageEnglish (US)
Title of host publicationMechanics of Hearing
Subtitle of host publicationProtein to Perception - Proceedings of the 12th International Workshop on the Mechanics of Hearing
EditorsDavid P. Corey, K. Domenica Karavitaki
PublisherAmerican Institute of Physics Inc.
Volume1703
ISBN (Electronic)9780735413504
DOIs
StatePublished - Dec 31 2015
Event12th International Workshop on the Mechanics of Hearing: Protein to Perception - Cape Sounio, Greece
Duration: Jun 23 2014Jun 29 2014

Other

Other12th International Workshop on the Mechanics of Hearing: Protein to Perception
CountryGreece
CityCape Sounio
Period6/23/146/29/14

Fingerprint

stimuli
low frequencies
probes
spectral bands
suppressors
waveforms
cut-off
retarding
thresholds
shift

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Siegel, J. H., & Charaziak, K. K. (2015). High-frequency tone-pip-evoked otoacoustic emissions in chinchillas. In D. P. Corey, & K. D. Karavitaki (Eds.), Mechanics of Hearing: Protein to Perception - Proceedings of the 12th International Workshop on the Mechanics of Hearing (Vol. 1703). [090002] American Institute of Physics Inc.. https://doi.org/10.1063/1.4939400
Siegel, Jonathan H ; Charaziak, Karolina K. / High-frequency tone-pip-evoked otoacoustic emissions in chinchillas. Mechanics of Hearing: Protein to Perception - Proceedings of the 12th International Workshop on the Mechanics of Hearing. editor / David P. Corey ; K. Domenica Karavitaki. Vol. 1703 American Institute of Physics Inc., 2015.
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abstract = "We measured otoacoustic emissions in anesthetized chinchillas evoked by short (1 ms) high-frequency (4 kHz) tone-pips (TEOAE) using either a compression or suppression method to separate the stimulus from the emission. Both methods revealed consistent features of the TEOAEs. The main spectral band of the emission generally corresponded to the spectrum of the stimulus, exhibiting a group delay similar to that of SFOAEs [9]. However, a second spectral band below 1.5 kHz, clearly separated from the low-frequency cut-off frequency of the stimulus spectrum, corresponded to an amplitude modulation of the waveform of the TEOAE. The group delay of this low-frequency band was similar to that of the main band near the probe frequency. The average level and group delay of the main band declined monotonically when revealed as the suppressor frequency was raised above the probe. The low-frequency band was more sensitive than the main band to shifts in compound action potential thresholds near the probe frequency induced by acute exposure to intense tones. Taken together, the experiments indicate that both the main and low-frequency bands of the TEOAE are generated primarily near the cochlear region maximally stimulated by the probe, but that significant contributions arise over a large region even more basal.",
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Siegel, JH & Charaziak, KK 2015, High-frequency tone-pip-evoked otoacoustic emissions in chinchillas. in DP Corey & KD Karavitaki (eds), Mechanics of Hearing: Protein to Perception - Proceedings of the 12th International Workshop on the Mechanics of Hearing. vol. 1703, 090002, American Institute of Physics Inc., 12th International Workshop on the Mechanics of Hearing: Protein to Perception, Cape Sounio, Greece, 6/23/14. https://doi.org/10.1063/1.4939400

High-frequency tone-pip-evoked otoacoustic emissions in chinchillas. / Siegel, Jonathan H; Charaziak, Karolina K.

Mechanics of Hearing: Protein to Perception - Proceedings of the 12th International Workshop on the Mechanics of Hearing. ed. / David P. Corey; K. Domenica Karavitaki. Vol. 1703 American Institute of Physics Inc., 2015. 090002.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Siegel JH, Charaziak KK. High-frequency tone-pip-evoked otoacoustic emissions in chinchillas. In Corey DP, Karavitaki KD, editors, Mechanics of Hearing: Protein to Perception - Proceedings of the 12th International Workshop on the Mechanics of Hearing. Vol. 1703. American Institute of Physics Inc. 2015. 090002 https://doi.org/10.1063/1.4939400