No warranty is given about the accuracy of the copy. However, users may print, download, or email articles for individual use. Copyright of Journal of Hearing Science is the property of Institute of Sensory Organs and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission.Furthermore, a developmental trend was observed between ages of 7 and 20's thus, age appropriated norms should be used for interpretation. In the present Korean compressed speech test, the 45% compression ratio showed appropriate ranges for both pediatric and adult samples. ![]() The recognition performance of children was significantly lower than adults in all compression ratios. Conclusions: This study showed that the word recognition performance decreased as time-compression ratio increased for both adult and pediatric groups. Significant developmental trends were seen between ages of 7 and 20's. ![]() An analysis of variance showed that there were no significant differences on ears and genders. For the adult group, the percent correct scores were 84.67☘.77 and 86.77☗.17% for the right and left ears, respectively. In Experiment II, for the pediatric groups, the mean percent correct scores were 78.43☑0.90% for the right ear and 78.93☙.78% for the left ear. The conditions that met about 70-80% correct word-recognition performance were between 45% and 55% for adults and below 45% for children. Second, the four sub-lists of each word list for adults under the 65% compression ratio revealed no significant differences in the recognition scores, thus confirming the equivalency of each word list. There were no significant recognition differences between the two lists. Results: In Experiment I, as the compression ratio increased from 45% to 75%, recognition performance decreased significantly from 88.00% to 29.67% for the KS lists and from 93.60% to 39.00% for the H lists. Experiment II was performed to collect normative data for the time-compressed speech test, percent correct recognition at 50 dB HL was measured on a sample of 270 children (aged 7-12 years) and 107 young adults (aged 20-29 years). Furthermore, the sub-list equivalency of the each list was examined with the compression ratio of 65%. The words were presented at 50 dB HL in four time-compressed conditions (45, 55, 65, and 75%). The Korean monosyllabic lists (KS lists and H lists) were used to assess wordrecognition performance in 20 adults and 36 school-aged children with normal hearing sensitivity. Methods: Two experiments were conducted Experiment I was conducted to define a compression ratio and a select word list for the TCS test. Moreover, age effects and normative data for both pediatric and young adult populations were shown for clinical use. ![]() Therefore, the purpose of this study was to develop a time-compressed speech (TCS) test of Korean monosyllabic word lists for evaluating the recognition of rapidly changing speech of central auditory system. Currently, in Korea, diagnosis and rehabilitation for central auditory processing disorders are inadequate for lack of valid and reliable behavioral tests. Assessing this ability is relevant to detect brainstem and cortical lesions in addition, these tests are useful to quantify central auditory dysfunction and rehabilitation planning. Abstract: Objectives: Monaural low-redundancy speech recognition paradigms, presenting degraded speech to one ear, assess the recognition of degraded speech, in which redundancy is reduced by filtering, time compression, interruption, or reverberation.
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