시간적 처리(temporal processing)는 소리의 시간적 요소를 정확하고 신속하게 처리하는 능력(Musiek et al., 2005)으로 복잡하고 상위 수준의 음성인식과 음성 언어 처리에 있어 가장 기본적인 음소 변별, 어휘와 운율적 변별, 듣기 종결 등에 큰 영향을 미친다 (Tyler et al., 1982). 시간적 처리는 크게 네 가지 측면 즉, 시간적 통합(temporal integration 또는 summation), 시간적 차폐(temporal masking), 시간적 패턴(temporal ordering, pattern 또는 sequencing), 및 시간적 분석(temporal resolution 또는 discrimination) 을 포함한다(ASHA, 2005; Weaver & tevens, 2006). 이 중 시간적 분석은 청각 시스템이 말소리나 다른 청각 자극 신호를 처리할 때 신호의 envelope나 진폭변조(amplitude modulation, AM) 변화 등과 같은 청각 신호에 대한 빠른 시간적 변화를 탐지하여 처리 하는 능력을 말한다(Gelfand, 1998). 이 능력은 말소리 탐지와 관련되어 배경소음이 있는 일상생활 속이나 복잡한 청각적 자극을 이해하는데 중요한 요소로 작용하며, 특히 음운 처리나 언어 인지 및 읽기와 밀접한 관련이 있으므로 매우 중요하다(Musiek & Chermak, 2007).
This study aimed at investigating the ability of temporal resolution in Korean adult population using Gaps-in-Noise (GIN) test, and examining the clinical feasibility for the diagnosis of auditory processing disorder. For the GIN test, mean approximated gap detection thresholds (A.th.) and percent correct responses were obtained. The reliability of the GIN was also tested. Subjects were 40 adults (20 males and 20 females) in their 20 years with normal hearing sensitivity. The results of this study are as follows. First, the results of GIN test showed that the mean A.th. were 4.95 (± 1.15) and 5.05 (± 1.18) msec for the right and left ears, respectively and the percent correct scores were 72.08% (± 7.13) and 72.13% (± 7.72) for the right and left ears, respectively. There were no significant differences between ears and genders. Furthermore, it is revealed that GIN is a high reliability test. The inter-list consistency indicated an equivalency between four GIN lists showed no significant difference. These findings in this study are similar to the results of the studies performed to other language population. Results of the study support that temporal resolution abilities measured by GIN may also be clinically feasible for Korean adult population.
INTRODUCTION MATERIALS AND METHODS RESULTS DISCUSSIONS AND CONCLUSIONS Acknowledgements
