Intensity discrimination determined with two paradigms in normal and hearing-impaired subjects.
Intensity discrimination determined with two paradigms in normal and hearing-impaired subjects.
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DOI：
10.1121/1.398329
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发表时间：
1989-07
期刊：
影响因子：
--
通讯作者：
C. Turner;J. Zwislocki;P. Filion
中科院分区：
文献类型：
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作者：
C. Turner;J. Zwislocki;P. Filion
关于听觉强度 jnd's 的文献对于用门控基座和连续基座测量的 jnd's 之间的关系以及在存在伴随耳蜗病理的响度补充的情况下这种关系的变化是不明确的。为了澄清这些问题并为系统研究 jnd 对响度函数的依赖性奠定基础，我们测量了两组受试者（一组具有正常听力，另一组患有耳蜗源性听力损失）的纯音 jnd 和门控和连续基座范式。实验通过自适应两种选择强制选择 (2IFC) 程序在 0.5、2 和 6 kHz 频率以及各种感觉水平 (SL) 下进行。对于两组受试者，使用连续基座法获得的 jnd 均小于使用门控基座法获得的 jnd。他们的受试者间标准差也较小。当在相同 SL 的基础上比较两组的 jnd 时，对于两种基座范式，听力损失组的 jnd 值均小于听力正常组。当在相同声压级 (SPL) 的基础上进行比较时，两组的中度和高声压级表现出相似的值。在声压级相对较低的情况下，听力损失群体的值往往较高。
The literature on auditory intensity jnd's is ambiguous with respect to the relationship between the jnd's measured with gated and continuous pedestals and with respect to changes in this relationship in the presence of loudness recruitment accompanying cochlear pathology. In an attempt to clarify these issues and to lay a foundation for systematic investigations of the dependence on the jnd's on loudness functions, the jnd's for pure tones with gated- and continuous-pedestal paradigms of two groups of subjects, one with normal hearing and one with hearing loss of cochlear origin, were measured. The experiments were performed at 0.5, 2, and 6 kHz, and at a wide range of sensation levels (SLs) by means of an adaptive two-alternative, forced-choice (2IFC) procedure. The jnd's obtained with the continuous-pedestal method were smaller than those obtained with the gated-pedestal method for both groups of subjects. They also had smaller intersubject standard deviations. When jnd's of the two groups were compared on the basis of equal SLs, the group with hearing loss showed smaller jnd values than the group with normal hearing for both pedestal paradigms. When the comparisons were made on the basis of equal sound-pressure levels (SPLs), both groups showed similar values for moderate and high SPLs. At relatively low SPLs, the group with hearing loss tended to have somewhat higher values.