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Suppression in Otoacoustic Emissions Evoked by Closely-spaced Two-tone Burst Stimuli
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In: ETSU Faculty Works (2008)
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| 42 |
Origin of Suppression of Otoacoustic Emissions Evoked by Two-Tone Bursts
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In: ETSU Faculty Works (2008)
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Abstract:
Otoacoustic emission (OAE) data recorded for tone bursts presented separately and as a two-tone burst complex, that had been reported previously [Yoshikawa, H., Smurzynski, J., Probst R., 2000. Suppression of tone burst evoked otoacoustic emissions in relation to frequency separation. Hear. Res. 148, 95–106], were re-processed using the method of adaptive approximations by matching pursuit (MP). Two types of stimuli were applied to record tone burst OAEs (TBOAEs): (a) cosine-windowed tone bursts of 5-ms duration with center frequencies of 1, 1.5, 2 and 3kHz, (b) complex stimuli consisting of a digital addition of the 1-kHz tone burst together with either the 1.5-, 2- or 3-kHz tone burst. The MP method allowed decomposition of signals into waveforms of defined frequency, latency, time span, and amplitude. This approach provided a high time–frequency (t–f) resolution and identified patterns of resonance modes that were characteristic for TBOAEs recorded in each individual ear. Individual responses to single-tone bursts were processed off-line to form ‘sum of singles’ responses. The results confirmed linear superposition behavior for a frequency separation of two-tone bursts of 2kHz (the 1-kHz and 3-kHz condition). For the 1, 1.5-kHz condition, the MP results revealed the existence of closely positioned resonance modes associated with responses recorded individually with the stimuli differing in frequency by 500Hz. Then, the differences between t–f distributions calculated for dual (two-tone bursts) and sum-of-singles conditions exhibited mutual suppression of resonance modes common to both stimuli. The degree of attenuation depended on the individual pattern of characteristic resonance modes, i.e., suppression occurred when two resonant modes excited by both stimuli overlapped. It was postulated that the suppression observed in case of dual stimuli with closely-spaced components is due to mutual attenuation of the overlapping resonance modes.
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Keyword:
Adaptive approximations; Audiology and Speech-Language Pathology; Otoacoustic emissions; Speech and Hearing Science; Speech Pathology and Audiology; Time–frequency distribution; Two-tone suppression
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URL: https://dc.etsu.edu/etsu-works/1990
https://doi.org/10.1016/j.heares.2007.10.005
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| 43 |
Influence of Monaural Overstimulation in Cochlear Function in Normal- hearing Adults Measured Psychoacoustically and with Spontaneous and Distortion Product Otoacoustic Emissions
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In: ETSU Faculty Works (2008)
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| 44 |
Distortion-product Otoacoustic Emissions in Patients with Low-frequency Sensorineural Hearing Loss
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In: ETSU Faculty Works (2007)
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| 45 |
Relationship Between Hearing Sensitivity and Distortion-product Otoacoustic Emissions in Patients with Low-frequency Sensorineural Hearing Loss
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In: ETSU Faculty Works (2007)
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| 46 |
Otoacoustic Emissions and High-frequency Hearing Sensitivity
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In: ETSU Faculty Works (2007)
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| 47 |
Otoacoustic Emissions: Recent Advances in Research and in Clinical Applications
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In: ETSU Faculty Works (2007)
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| 48 |
Acoustic Foundations of Signal Enhancement and Room Acoustics
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In: ETSU Faculty Works (2007)
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| 49 |
Otoacoustic Emission Testing in Children
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In: ETSU Faculty Works (2007)
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| 50 |
Contralateral Suppression of Otoacoustic Emissions
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In: ETSU Faculty Works (2006)
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| 51 |
Influence of Salicylate on Cochlear Function: Monaural Sensitivity Thresholds and Otoacoustic Emissions
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In: ETSU Faculty Works (2006)
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| 52 |
Spontaneous and Distortion Product Otoacoustic Emissions and Extended High-frequency Hearing Sensitivity
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In: ETSU Faculty Works (2006)
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| 53 |
Time-course of Contralateral Suppression of Spontaneous Otoacoustic Emissions
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In: ETSU Faculty Works (2006)
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| 54 |
Otoacoustic Emissions and Extended High-Frequency Hearing Sensitivity in Young Adults
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In: ETSU Faculty Works (2005)
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| 55 |
Lateralization Performance in Normal-hearing Adults Evaluated During Short-term Induced Asymmetrical Changes of Auditory Periphery
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In: ETSU Faculty Works (2005)
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| 56 |
Effects of Age, Age-Related Hearing Loss, and Contralateral Cafeteria Noise on the Discrimination of Small Frequency Changes: Psychoacoustic and Electrophysiological Measures
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In: ETSU Faculty Works (2005)
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| 57 |
Adaptation of Lateralization Performance to Short-term Induced Conductive and Sensorineural Changes
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In: ETSU Faculty Works (2005)
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| 58 |
Influence of Monaural Overstimulation on Binaural Performance Measured with an Intracranial Image Task
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In: ETSU Faculty Works (2004)
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| 59 |
Test-Retest Reliability of Pure-Tone Thresholds from 0.5 to 16 kHz using Sennheiser HDA 200 and Etymotic Research ER-2 Earphones
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In: ETSU Faculty Works (2004)
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| 60 |
Performance of Otoacoustic Emission Tests when Used to Predict Auditory Status
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In: ETSU Faculty Works (2004)
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