Clinical Experience with Remote Masking

Cervellera, G; Quaranta, A; Amoroso, C

doi:10.3109/00206098009070074

Cited by 9 publications

(4 citation statements)

References 11 publications

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“…R M consists of a threshold increase for low frequency tones when the ear is exposed to high frequency narrowband noise delivered at an overall noise level of ] 80 dB SPL. This phenomenon has been attributed to mechanical non-linear distortion of the vibrating structure within the inner ear (14), and has been proposed as a test of cochlear partition elasticity (15). It has also been postulated that R M is related to the distortion product f2 -f1 (16).…”

Section: Methodsmentioning

confidence: 99%

Cochlear Function in Ears with Immunomediated Inner Ear Disorder

Quaranta

Scaringi

Sallustio

et al. 2002

Acta Oto-Laryngologica

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Quaranta A, Scaringi A, Sallustio V, Quaranta N. Cochlear function in ears with immunomediated inner ear disorder. Acta Otolaryngo l 2002; Suppl 548: 15 -19.The aim of the presen t study was to evaluat e the performance of ears with inner ear disorder , responsive to immunosupp ressive drugs, in advanced tests designed to assess primary cochlea r functions (temporal integration, frequency selectivity, cochlear mechanics). The results of this study suggest that immunomedia ted inner ear disease results, in the acute clinical stage, in the developmen t of endolymphat ic hydrops, which increases the stiffness of the vibrating structures within the inner ear and causes dysfunction s of the outer hair cells. Our patients presented with upsloping or at sensorineura l hearing loss, absence of evoked otoacoustic emissions and distortion-product otoacoustic evoked emissions and abnorma l temporal integration, frequency selectivity and cochlea r mechanics. F ollowing immunosupp ressive treatment, hydrop s recovered , hearing subsequently returned to normal, the audiometr ic curve became at at low-to-middle frequencies and primary cochlea r function tended to normalize. This study seems to suppor t the usefulness of testing primary cochlea r function s in order to monitor the clinical course of immunomediated inner ear disorders.

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Section: Methodsmentioning

confidence: 99%

Cochlear Function in Ears with Immunomediated Inner Ear Disorder

Quaranta

Scaringi

Sallustio

et al. 2002

Acta Oto-Laryngologica

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“…1. RM in normal-hearing and hearing-im paired human subjects (adapted from Ccrvcllcra et al [10]). Thresholds were measured in quiet using stan dard audiometric procedures, following by measure ments of masked thresholds, in the presence of a con tinuous narrow band of noise centered at 3 kHz.…”

Section: Introductionmentioning

confidence: 99%

“…The basie RM phenomenon and its rela tion to hearing loss in humans is illustrated in figure 1. using data from Ccrvellera et al [ 10]. The masker was a narrow band of noise (305-Hz bandwidth) centered at 3 kHz, presented at a fixed level of 98 dB sound pressure level (SPI.…”

Section: Introductionmentioning

confidence: 99%

“…One poorly understood psychophysical change that has been associated with a variety of auditory disorders in humans is reduced remote masking (RM) [9][10][11][12][13][14], RM refers to the phenomenon whereby thresholds for lowfrequency signals are elevated in the presence o f intense high-frequency noise or a two-tone complex [9][10][11][12][13][14][15][16][17][18][19][20][21]. Previous studies have identi fied two features o f RM that distinguish it from 'direct' masking as described originally by Wegel and Lane [22] and Fletcher [23], in which masking is accounted for in terms of spread of excitation along the basilar mem brane, and therefore decreases as the differ ence between masker frequency and signal frequency increases.…”

Section: Introductionmentioning

confidence: 99%

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Remote Masking in Normal-Hearing and Noise-Exposed Chinchillas

1997

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Remote masking (RM), the phenomenon whereby an intense high-frequency masking noise elevates thresholds for low-frequency signals, has been shown to be sensitive to various types of hearing loss in humans. We performed two experiments to evaluate the chinchilla as a model of RM and to examine changes in RM associated with temporary threshold shifts (TTSs) induced by low-frequency noise exposure. Thresholds for 0.5-, 1- and 2-kHz tones were measured in quiet, then in the presence of a narrow-band (300-Hz-wide) masking noise centered at 3 kHz. In Experiment I, effective masking was measured as a function of masker level, from 48 to 98 dB sound pressure level (SPL; referenced to 20 µPa), to determine threshold and rate of growth of RM in the chinchilla. In Experiment II, RM was measured before, during and after exposure to a low-frequency noise known to produce TTSs in chinchillas (i.e., a 0.5-kHz octave band noise at 90 dB SPL for 6 h/day for 10 days). The results show that normal-hearing chinchillas have the same pattern of RM as humans, and that a noise exposure that produces TTSs also produces rapid and significant changes in RM.

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Klinik der Innenohrschwerhörigkeiten

Lehnhardt

1984

Verhandlungsbericht 1984 Der Deutschen Gesellschaft Für Hals- Nasen- Ohren-Heilkunde, Kopf- Und Hals-Chirurgie

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Clinical Experience with Remote Masking

Cited by 9 publications

References 11 publications

Cochlear Function in Ears with Immunomediated Inner Ear Disorder

Cochlear Function in Ears with Immunomediated Inner Ear Disorder

Remote Masking in Normal-Hearing and Noise-Exposed Chinchillas

Klinik der Innenohrschwerhörigkeiten

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