| Frequency-specific measurements of the temporal modulation transfer function using narrowband noise. | |
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MedLine Citation:
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PMID: 20331142 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Interpretation of frequency-specific measures of temporal acuity is often confounded by the coexistence of spectral and temporal cues. The current study presents a new experimental technique to measure the temporal modulation transfer function (TMTF), in which inherent envelope modulations in narrowband noise are used as the detection target. Modulation depths of the stimuli were manipulated using a signal processing algorithm that introduced no change in the stimuli's power spectra. In this way, spectral cues cannot cue the presence of modulation. TMTFs were measured using these narrowbands of noise [TMTF-NS (no spectral cues)] at four center frequencies (2, 4, 6, and 8 kHz) and bandwidths of 16, 24, 32, 48, 64, 96, and 128 Hz. TMTFs using low-pass-noise modulated puretones (TMTF-NBM) were also measured for comparison. In cases where the spectral cues are limited in TMTF-NBM (at low-modulation rates or at high-carrier frequencies), thresholds are very similar between the TMTF-NS and the TMTF-NBM, providing validation that this new technique measures temporal acuity similar to standard TMTF methods. In conditions where spectral cues are available in TMTF-NBM (high-modulation rates and lower carrier frequencies), higher thresholds are measured for TMTF-NS and a more reasonable estimate of temporal acuity is obtained. |
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Authors:
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Yi Shen; Jennifer Lentz |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 127 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-03-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 2016 Citation Subset: IM |
Affiliation:
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Dept. of Speech and Hearing Sci., Indiana Univ., 200 S Jordan Ave., Bloomington, IN 47405, shen2@indiana.edu. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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