Arehart K H
Department of Communication Disorders and Speech Science, University of Colorado, Boulder 80309.
J Acoust Soc Am. 1994 Jun;95(6):3574-85. doi: 10.1121/1.409975.
Complex-tone (fundamental) frequency discrimination was measured in eight well-trained listeners with moderately severe sensorineural hearing impairments as a function of parametric variations in the rank, number, and sensation level of stimulus components. Results indicate substantial differences in the effects of harmonic content on complex-tone frequency discrimination among hearing-impaired listeners and between hearing-impaired and normal-hearing listeners. Despite large variability among the hearing-impaired subjects, several patterns of results emerged: Performance of two subjects grew worse as harmonic rank increased; performance of three subjects did not change substantially with changes in harmonic rank; and performance of three impaired subjects improved as harmonic rank increased. Performance of all but two subjects was significantly degraded for stimuli containing low-order harmonics. For stimuli containing only high-order harmonics, five subjects showed performance that was comparable to that of normal-hearing subjects, and three showed abnormally poor performance. Performance of impaired subjects generally improved as the number of stimulus components increased. The sensation level of stimulus components influenced the performance of several impaired subjects, but not in a uniform manner. To the extent that complex-tone fundamental-frequency discrimination can be assumed to be a pitch perception task, the present results suggest that, in contrast to normal-hearing subjects, hearing-impaired listeners rely primarily on periodicity cues in the perception of complex-tone pitch.
对八名训练有素、患有中度重度感音神经性听力损失的听众进行了复音（基频）频率辨别测试，测试结果作为刺激成分的阶次、数量和感觉水平参数变化的函数。结果表明，谐波含量对听力受损听众之间以及听力受损和听力正常听众之间的复音频率辨别效果存在显著差异。尽管听力受损受试者之间存在很大差异，但仍出现了几种结果模式：随着谐波阶次增加，两名受试者的表现变差；三名受试者的表现随谐波阶次变化没有显著改变；三名听力受损受试者的表现随着谐波阶次增加而改善。除两名受试者外，所有受试者对包含低阶谐波的刺激的表现均显著下降。对于仅包含高阶谐波的刺激，五名受试者的表现与听力正常的受试者相当，三名受试者表现异常差。随着刺激成分数量增加，听力受损受试者的表现总体上有所改善。刺激成分的感觉水平影响了几名听力受损受试者的表现，但方式并不统一。就复音基频辨别可被视为一种音高感知任务而言，目前的结果表明，与听力正常的受试者相比，听力受损的听众在复音音高感知中主要依赖周期性线索。
