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Residual inhibition functions in relation to tinnitus spectra and auditory threshold shift.

Abstract

CONCLUSIONS

Psychoacoustic functions relating the depth and duration of tinnitus suppression ('residual inhibition') to the center frequency of band-passed noise masking sounds appear to span the region of hearing loss, as do psychoacoustic measurements of the tinnitus spectrum. The results (1) suggest that cortical map reorganization induced by hearing loss is not the principal source of the tinnitus sensation and (2) provide a necessary baseline for optimizing residual inhibition in individual cases.

OBJECTIVE

To measure residual inhibition functions and tinnitus spectra using sounds spanning the region of hearing loss.

MATERIALS AND METHODS

Three subject-driven, computer-based tools were developed and applied to measure psychoacoustic properties of tinnitus and residual inhibition in 32 subjects with chronic tonal, ringing, or hissing tinnitus. Residual inhibition functions were measured with band-passed noise sounds varying in center frequency up to 12.0 kHz.

RESULTS

The depth and duration of residual inhibition increased with the center frequency of the band-passed noise stimuli. Near-elimination of tinnitus for up to 45 s was reported by 8/24 (33%) subjects at center frequencies above 3 kHz (these cases distributed across tinnitus types). Tinnitus spectra covered the region of hearing loss with no preponderance of frequencies near the audiometric edge of normal hearing.

Authors+Show Affiliations

Department of Psychology, Neuroscience, and Behavior, McMaster University, Hamilton, Ontario, Canada. roberts@mcmaster.caNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17114139

Citation

Roberts, Larry E., et al. "Residual Inhibition Functions in Relation to Tinnitus Spectra and Auditory Threshold Shift." Acta Oto-laryngologica. Supplementum, 2006, pp. 27-33.
Roberts LE, Moffat G, Bosnyak DJ. Residual inhibition functions in relation to tinnitus spectra and auditory threshold shift. Acta Otolaryngol Suppl. 2006.
Roberts, L. E., Moffat, G., & Bosnyak, D. J. (2006). Residual inhibition functions in relation to tinnitus spectra and auditory threshold shift. Acta Oto-laryngologica. Supplementum, (556), 27-33.
Roberts LE, Moffat G, Bosnyak DJ. Residual Inhibition Functions in Relation to Tinnitus Spectra and Auditory Threshold Shift. Acta Otolaryngol Suppl. 2006;(556)27-33. PubMed PMID: 17114139.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Residual inhibition functions in relation to tinnitus spectra and auditory threshold shift. AU - Roberts,Larry E, AU - Moffat,Graeme, AU - Bosnyak,Daniel J, PY - 2006/11/23/pubmed PY - 2007/5/9/medline PY - 2006/11/23/entrez SP - 27 EP - 33 JF - Acta oto-laryngologica. Supplementum JO - Acta Otolaryngol Suppl IS - 556 N2 - CONCLUSIONS: Psychoacoustic functions relating the depth and duration of tinnitus suppression ('residual inhibition') to the center frequency of band-passed noise masking sounds appear to span the region of hearing loss, as do psychoacoustic measurements of the tinnitus spectrum. The results (1) suggest that cortical map reorganization induced by hearing loss is not the principal source of the tinnitus sensation and (2) provide a necessary baseline for optimizing residual inhibition in individual cases. OBJECTIVE: To measure residual inhibition functions and tinnitus spectra using sounds spanning the region of hearing loss. MATERIALS AND METHODS: Three subject-driven, computer-based tools were developed and applied to measure psychoacoustic properties of tinnitus and residual inhibition in 32 subjects with chronic tonal, ringing, or hissing tinnitus. Residual inhibition functions were measured with band-passed noise sounds varying in center frequency up to 12.0 kHz. RESULTS: The depth and duration of residual inhibition increased with the center frequency of the band-passed noise stimuli. Near-elimination of tinnitus for up to 45 s was reported by 8/24 (33%) subjects at center frequencies above 3 kHz (these cases distributed across tinnitus types). Tinnitus spectra covered the region of hearing loss with no preponderance of frequencies near the audiometric edge of normal hearing. SN - 0365-5237 UR - https://www.unboundmedicine.com/medline/citation/17114139/Residual_inhibition_functions_in_relation_to_tinnitus_spectra_and_auditory_threshold_shift_ L2 - http://www.diseaseinfosearch.org/result/9653 DB - PRIME DP - Unbound Medicine ER -