Department of Communication Sciences and Disorders, University of South Carolina, Columbia, South Carolina 29208, USA.
J Acoust Soc Am. 2012 Jun;131(6):EL499-505. doi: 10.1121/1.4722172.
Temporal processing declines with age may reduce the processing of concurrent vowels. For this study, listeners categorized vowel pairs varying in temporal asynchrony as one sound, two overlapping sounds, or two sounds separated by a gap. Two boundaries separating the three response categories, multiplicity and gap-identification, were measured. Compared to young and middle-aged listeners, older listeners required longer temporal offsets for multiplicity. Middle-aged and older listeners also required longer offsets for gap-identification. For older listeners, correlations with various temporal processing tasks indicated that vowel temporal-order thresholds were related to multiplicity, while age and non-speech gap-detection thresholds were related to gap-identification.
随着年龄的增长，时间处理能力下降可能会降低对并发元音的处理能力。在这项研究中，听众将在时间上不同步的元音对分类为一个声音、两个重叠的声音或两个由间隙隔开的声音。测量了三个响应类别（多样性和间隙识别）的两个边界。与年轻和中年听众相比，老年听众需要更长的时间偏移才能实现多样性。中年和老年听众也需要更长的时间偏移才能实现间隙识别。对于老年听众，与各种时间处理任务的相关性表明，元音时间顺序阈值与多样性相关，而年龄和非言语间隙检测阈值与间隙识别相关。
