Development of a 500-Hz Masking-Level Difference Protocol for Clinic Use

Wilson, Richard H.; Moncrieff, Deborah; Townsend, Elizabeth; Pillion, Amanda L.

doi:10.3766/jaaa.14.1.2

Cited by 74 publications

(78 citation statements)

References 29 publications

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“…The Masking Level Difference (MLD) test measures binaural processing. The version of the test [17][18] used in both the current and previous investigations [3] estimates thresholds for tones presented in a series of trials in which a noise burst is presented to both ears (in phase, or "diotically"). The signal to be detected consists of five 500 Hz tone bursts separated from each other by 250 ms of silence.…”

Section: Behavioral Tests Of Central Auditory Functionmentioning

confidence: 99%

Chronic effects of exposure to high-intensity blasts: Results on tests of central auditory processing

et al. 2016

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Abstract-Patients who have recently experienced highintensity blasts are more likely to perform abnormally on tests developed to be sensitive to deficits of central auditory processing than were age-and hearing-matched individuals without blast exposures. Here, a group of 59 participants was recruited, 30 of whom were exposed to high-intensity blasts between 4 and 11 yr prior to testing and did not participate in the previous study, along with 29 controls similar in age and hearing thresholds to the blast group. All were tested on a set of behavioral tests that were used in the previous study. Abnormal performance was measured with reference both to published normative data and to the average performance of the control group. Members of the blast-exposed group were again found to be significantly more likely to perform in the abnormal range than were the members of the control group. Because the patients in this study were tested a minimum of 4 yr after blast exposure, these results suggest that for some of those exposed, problems processing auditory information may be a chronic effect of blast exposure even in the absence of significant peripheral hearing loss.

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Section: Behavioral Tests Of Central Auditory Functionmentioning

confidence: 99%

Chronic effects of exposure to high-intensity blasts: Results on tests of central auditory processing

et al. 2016

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“…The test used in the present study was that developed by Wilson et al (2003) and it is commercially available from Auditec, St. Louis. The MLD assesses the auditory process of binaural interaction (Bellis, 2003;Masquelier, 2003).…”

Section: Masking Level Differencementioning

confidence: 99%

“…However, when the tone burst and noise characteristics differ (for example, are out-of-phase) the masking effect of the noise decreases. The test developed by Wilson et al (2003) modifies the phase only of the tone burst, keeping the phase of the noise identical in both ears. When the signal is p radians out-of-phase at the ears and the noise is in-phase between ears (SpNo), then the waveforms of the signal presented to the ears differ with respect to both temporal and amplitude characteristics.…”

Section: Masking Level Differencementioning

confidence: 99%

Auditory processing tests for Spanish-speaking adults: An initial study

Fuente

McPherson

2006

International Journal of Audiology

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There is no standardized material to assess auditory processing (AP) in Spanish-speaking adults. The purpose of this research was to develop and obtain initial normative data for AP tests for Spanish-speaking adults. The AP tests comprised the Hong Kong CAPA (Hong Kong central auditory processing assessment) including speech-in-noise, binaural fusion, filtered speech, and dichotic digit tests. In addition five tests already developed by other authors, but with no normative data reported for the target population, were included in the study. These tests were staggered spondaic words, random gap detection, pitch pattern sequence, duration pattern sequence, and masking level difference. Forty normal hearing Chilean adults were assessed to obtain the initial normative data. Several correlations were found between tests and between subtests within the same test category. 90th percentiles are suggested as initial normative data.

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“…While all participants had pure tone thresholds of 25 dB hearing level (HL) at frequencies from 250 to 8,000 Hz and over 90 percent in each group had age-appropriate word recognition scores, 39 percent of the blast-exposed participants performed below normal on a measure of speech-in-noise (Quick-SIN) [21] compared with 3 percent of the control group. Similarly, relative to the control group, a greater proportion of the blast-exposed group had abnormal performance in one or both ears on a measure of auditory temporal resolution (Gaps-In-Noise Test) [22] (39% vs 3%), on a test of binaural processing (masking level difference) [23][24] (33% vs 3%), and on a measure of speech segregation and competing speech (Staggered Spondaic Word Test [SSW]) (44% vs 3%). Performance deficits among the blast-exposed group were not universal, in that there were no between-group differences in the percentage of individuals with abnormal performance on measures of dichotic listening (Dichotic Digits Test) [25] and temporal pattern perception (Frequency Patterns Test) [26].…”

Section: Introductionmentioning

confidence: 98%

Auditory difficulties in blast-exposed Veterans with clinically normal hearing

et al. 2015

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Abstract-Vast numbers of blast-injured Operation Iraqi Freedom/Operation Enduring Freedom/Operation New Dawn personnel report postconcussive symptoms that include headache, dizziness, poor memory, and difficulty concentrating. In addition, many report hearing problems, such as difficulty understanding speech in noise, yet have no measureable peripheral auditory deficits. In this article, self-report and performancebased measures were used to assess 99 blast-exposed Veterans. All participants reported auditory problems in difficult listening situations but had clinically normal hearing. Participants' scores on self-report questionnaires of auditory difficulties were more similar to scores of older individuals with hearing impairment than to those of younger individuals with normal hearing. Participants showed deficits relative to published normative data on a number of performance-based tests that have demonstrated sensitivity to auditory processing deficits. There were several measures on which more than the expected number of participants (15.9%) performed one or more standard deviations below the mean. These were assessments of speech understanding in noise, binaural processing, temporal resolution, and speech segregation. Performance was not universally poor, with approximately 53% of participants performing abnormally on between 3 and 6 of the 10 measures. We concluded that participants exhibited task-specific deficits that add to the evidence suggesting that blast injury results in damage to the central auditory system. Clinical

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Development of a 500-Hz Masking-Level Difference Protocol for Clinic Use

Cited by 74 publications

References 29 publications

Chronic effects of exposure to high-intensity blasts: Results on tests of central auditory processing

Chronic effects of exposure to high-intensity blasts: Results on tests of central auditory processing

Auditory processing tests for Spanish-speaking adults: An initial study

Auditory difficulties in blast-exposed Veterans with clinically normal hearing

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