Doherty K A, Lutfi R A
Communication Sciences and Disorders, Syracuse University, New York 13244, USA.
J Acoust Soc Am. 1996 Feb;99(2):1053-8. doi: 10.1121/1.414634.
A conditional-on-a-single-stimulus (COSS) analysis procedure [B. G. Berg, J. Acoust. Soc. Am. 86, 1743-1746 (1989)] was used to measure the weight or relative reliance that normal-hearing and hearing-impaired listeners give to different frequencies in the discrimination of the overall level of a multitone complex. On each trial, two multitone-tone complexes comprised of six octave frequencies from 250 to 8000 Hz were presented to subjects. The levels of the frequencies for each complex were randomly varied. The listeners task was to identify the complex with the higher overall intensity level. Normal-hearing listeners used a variety of listening strategies to perform the task, showing no general preference to weight one component over another. Hearing-impaired listeners, however, showed a general tendency to give greatest weight to the spectral information in the region of their hearing loss. Thirteen of the 14 hearing-impaired listeners, all of whom had a high-frequency sensorineural hearing loss, weighted one or more of the high-frequence components in the complex the greatest.
采用单刺激条件（COSS）分析程序[B.G.伯格，《美国声学学会杂志》86，1743 - 1746（1989）]来测量听力正常和听力受损的听众在辨别多音复合音整体水平时对不同频率的重视程度或相对依赖程度。在每次试验中，向受试者呈现由250至8000赫兹的六个倍频程频率组成的两个多音复合音。每个复合音中各频率的声级随机变化。听众的任务是识别整体强度水平较高的复合音。听力正常的听众使用多种听力策略来完成任务，对某一成分的重视程度没有普遍偏好。然而，听力受损的听众普遍倾向于对其听力损失区域的频谱信息给予最大权重。14名听力受损听众中有13名，他们均患有高频感音神经性听力损失，对复合音中一个或多个高频成分给予了最大权重。
