Wilson Richard H, Burks Christopher A, Weakley Deborah G
James H. Quillen Department of Veterans Affairs Medical Center, Mountain Home, Johnson City, TN, USA.
J Rehabil Res Dev. 2005 Jul-Aug;42(4):499-510. doi: 10.1682/jrrd.2004.10.0134.
This study compares, for listeners with normal hearing and listeners with hearing loss, the recognition performances obtained with digit-pair and digit-triplet stimulus sets presented in multitalker babble. Digits 1 through 10 (excluding 7) were mixed in approximately 1,000 ms segments of babble from 4 to -20 dB signal-to-babble (S/B) ratios, concatenated to form the pairs and triplets, and recorded on compact disc. Nine and eight digits were presented at each level for the digit-triplet and digit-pair paradigms, respectively. For the listeners with normal hearing and the listeners with hearing loss, the recognition performances were 3 dB and 1.2 dB better, respectively, on digit pairs than on digit triplets. For equal intelligibility, the listeners with hearing loss required an approximately 10 dB more favorable S/B than the listeners with normal hearing. The distributions of the 50% points for the two groups had no overlap.
本研究比较了听力正常的听众和听力损失的听众在多说话者嘈杂环境中，使用数字对和数字三联体刺激集时的识别表现。数字1到10（不包括7）被混入信噪比为4至 -20 dB的大约1000毫秒的嘈杂声段中，连接形成数字对和数字三联体，并录制在光盘上。在数字三联体和数字对范式中，每个水平分别呈现9个和8个数字。对于听力正常的听众和听力损失的听众，数字对的识别表现分别比数字三联体好3 dB和1.2 dB。为了达到相同的可懂度，听力损失的听众比听力正常的听众需要大约高10 dB的有利信噪比。两组的50%点分布没有重叠。
