| Human frequency-following response to speech-like sounds: correlates of off-frequency masking. | |
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MedLine Citation:
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PMID: 19893303 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Off-frequency masking of the second formant by energy at the first formant has been shown to influence both identification and discrimination of the second formant in normal-hearing and hearing-impaired listeners. While both excitatory spread and two-tone suppression have been implicated in this simultaneous masking, their relative contribution has been shown to depend on both the level of the masker and the frequency separation between the probe and the masker. Off-frequency masking effects were evaluated in 10 normal-hearing human adults using the frequency-following response (FFR) to two two-tone approximations of vowel stimuli (/a/ and /u/). In the first experiment, the masking effect of F(1) on F(2) was evaluated by attenuating the level of F(1) relative to a fixed F(2) level. In the second experiment, the masking effect was evaluated by increasing the frequency separation between F(1) and F(2) using F(2) frequency as the variable. Results revealed that both attenuation of the F(1) level, and increasing the frequency separation between F(1) and F(2) increased the magnitude of the FFR component at F(2). These results are consistent with a release from off-frequency masking. Given that the results presented here are for high signal and masker levels and for relatively smaller frequency separation between the masker and the probe, it is possible that both suppression and excitatory spread contributed to the masking effects observed in our data. |
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Authors:
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Ananthanarayan Krishnan; Smita Agrawal |
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1880293 - The effect of pure-tone forward masking on overshoot. 8234753 - Pattern recognition and masking in cochlear implant patients. 16600323 - Vertical-size disparities are temporally integrated for slant perception. |
Publication Detail:
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Type: Journal Article Date: 2009-11-05 |
Journal Detail:
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Title: Audiology & neuro-otology Volume: 15 ISSN: 1421-9700 ISO Abbreviation: Audiol. Neurootol. Publication Date: 2010 |
Date Detail:
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Created Date: 2010-05-20 Completed Date: 2010-08-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9606930 Medline TA: Audiol Neurootol Country: Switzerland |
Other Details:
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Languages: eng Pagination: 221-8 Citation Subset: IM |
Copyright Information:
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Copyright2009 S. Karger AG, Basel. |
Affiliation:
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Auditory Electrophysiology Laboratory, Department of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, IN 47907-2038, USA. rkrish @ purdue.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Cerebral Cortex / physiology Electroencephalography Evoked Potentials, Auditory / physiology Female Humans Male Perceptual Masking / physiology* Phonetics* Pitch Discrimination / physiology* Sound Spectrography* Speech Acoustics* Speech Perception / physiology* Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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