Carter A S, Wilson R H
Veteran Affairs Medical Center, Mountain Home, Tennessee 37684, USA.
J Rehabil Res Dev. 2000 Sep-Oct;37(5):599-606.
The new compact disc from the Department of Veterans Affairs, Tonal and Speech Materials for Auditory, Perceptual Assessment, Disc 2.0 (1998), contains two lists of randomly interleaved 1-, 2-, and 3-pair dichotic digits. Two experiments are reported, in which the effects of low-pass filtering and inter-digit interval on dichotic digit recognition were investigated in adult listeners with normal hearing and with mild-to-moderate cochlear hearing loss. Results demonstrated that in the filtered condition, as the low-pass cutoff was increased, there was an increase in recognition performance for 1-, 2-, and 3-pair dichotic digits. When compared to normative data for the materials, findings indicate that the interleaved 1-, 2-, and 3-pair dichotic digit materials were essentially resistant to the effects of hearing loss. There was no significant change in recognition performance as a function of inter-digit interval. The studied 625-ms range of inter-digit intervals studied produced consistent recognition performance with both groups of listeners.
美国退伍军人事务部的新光盘《用于听觉、感知评估的音调与语音材料，光盘2.0》（1998年）包含两份随机交错排列的1对、2对和3对双耳数字列表。报告了两项实验，其中研究了低通滤波和数字间隔对听力正常以及轻度至中度耳蜗性听力损失的成年听众双耳数字识别的影响。结果表明，在滤波条件下，随着低通截止频率的增加，1对、2对和3对双耳数字的识别性能有所提高。与这些材料的标准数据相比，研究结果表明，交错排列的1对、2对和3对双耳数字材料基本上不受听力损失的影响。识别性能不会随数字间隔而发生显著变化。所研究的625毫秒数字间隔范围在两组听众中产生了一致的识别性能。
