A REEXAMINATION OF THE FREQUENCY DISCRIMINATION OF RANDOM-AMPLITUDE TONES, AND A TEST OF HENNING MODIFIED ENERGY-DETECTOR MODEL
A REEXAMINATION OF THE FREQUENCY DISCRIMINATION OF RANDOM-AMPLITUDE TONES, AND A TEST OF HENNING MODIFIED ENERGY-DETECTOR MODEL
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DOI：
10.1121/1.397953
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发表时间：
1989-04-01
影响因子：
2.4
通讯作者：
BUTENSKY, B
中科院分区：
文献类型：
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作者：
EMMERICH, DS;ELLERMEIER, W;BUTENSKY, B
Henning [G. B。Henning，J. Acoust. Soc. Am. 39，336-339（1966）]：对于低于4000 Hz的频率，在两个间隔的强迫选择（21 FC）任务中，在待辨别的两个音调之间引入水平的随机差异不会损害频率辨别。这一结果与Henning [G. B。Henning，J. Acoust，Soc. Am. 42，1325-1334（1967）]，其中观察者监视单个听觉滤波器的输出的一类模型之一，以及频率鉴别的激励模式模型。然而，在这里报道的第一个实验中，发现频率歧视与水平的随机差异的损害时，一个受试者内的实验设计。在第二个实验中，音高-强度关系在类似于Henning（1966）的实验情况下的作用被探索。最后，在第三个实验中，这个模型的独立测试，不涉及水平差异，进行。结果与单过滤器模型不一致，但可以通过包含两个过滤器的模型版本来解释。
A surprising result is reported by Henning [G. B. Henning, J. Acoust. Soc. Am. 39, 336-339 (1966)]: For frequencies lower than 4000 Hz, frequency discrimination was not impaired by the introduction of random differences in level between the two tones to be discriminated in a two-interval forced-choice (21FC) task. This result is inconsistent with a model of detection and discrimination proposed by Henning [G. B. Henning, J. Acoust, Soc. Am. 42, 1325-1334 (1967)], one of a class of models in which the observer monitors the output of a single auditory filter, as well as with excitation-pattern models of frequency discrimination. In the first experiment reported here, however, an impairment of frequency discrimination with random differences in level is found when a within-subjects experimental design is used. In a second experiment, the role of pitch-intensity relationships in an experimental situation similar to that of Henning (1966) is explored. Finally, in a third experiment, an independent test of this model, which does not involve level differences, is carried out. The results are not consistent with the single-filter model, but can be accounted for by a version of the model that incorporates two filters.