Abstract
OBJECTIVES:To verify the neuromaturational influence in the ability of auditory closure, that is, to verify the performance of children and young adults in the ability of auditory closure, through the time compressed speech test (TCS).METHODS:Thirty children (8 to 10 years old) and 30 young adults (16 to 24 years old) with normal hearing without complaints (neurological, cognitive, auditory processing) who performed TFC (monosyllables and disyllables) with a compression ratio of 60% in both ears. Statistical analysis was performed using analysis of variance (ANOVA) and ANOVA with repeated measures with a significance level of 0.05. The minimum statistical power was 80%.RESULTS:In the comparison between ears, there was no significant difference between groups for the monosyllables. For disyllables, the second ear tested was better in children, and the right ear was better than the left ear for young adults. In the comparison between modalities (monosyllables and disyllables), children did not show significant differences. The performance of the young adults was better in the disyllables in both ears. Comparing the age groups, the young adults were better than the children for both modalities and ears.CONCLUSION:The study has demonstrated the influence and impact of age (maturational factor) on TCS test performance, showing the importance of establishing normality patterns for various age groups to provide a standardized tool for evaluation of auditory closure ability.
Highlights
Low-redundancy monotic speech tests are administered monaurally with degraded speech stimuli
Difference between the ears In both the child and young adult groups, comparisons between ears (Figure 1) revealed no significant differences in the timecompressed speech test (TCST) in the ‘monosyllable’ modality
The young adult group performed significantly better in the right ear than in the left ear (p=0.05)
Summary
Low-redundancy monotic speech tests are administered monaurally with degraded speech stimuli. One of the most frequently used low-redundancy monotic tests is the timecompressed speech test (TCST), which involves compression of the speech stimulus by removing portions of the sound wave electromechanically and joining the remaining segments and presenting them at normal speed. This compression reduces redundancies extrinsic to speech, allowing the duration to be reduced by changing the speed without changing the fundamental frequency of the signal [1,2]. In addition to the compression effect, speech signal processing can be affected by other factors.
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