Robinson D O
J Speech Hear Res. 1975 Mar;18(1):5-16. doi: 10.1044/jshr.1801.05.
Seven normal-hearing subjects and seven subjects with mild bilateral high-frequency sensorineural hearing losses were studied to explore the presence of diplacusis. A tracking procedure of psychophysical method of adjustment-limits was used for pitch judgments rather than the traditional method of adjustment. Each subject was presented with a standard 4000-Hz tone for 500 msec and alternately a variable tone for 500 msec. Subjects were instructed to adjust the variable tone upward or downward in pitch to bracket the pitch sensation of the standard tone. Two intra-aural and two interaural listening conditions were studied. A graphic representation of the subjects' adjustments of the variable tone was obtained for each condition. The resulting tracing indicated frequency correlated to the pitch adjustments from which excursion width and constant error were calculated. Some hard-of-hearing subjects and one normal-hearing subject were found to have diplacusis. Subjects with hearing losses exhibited larger excursion widths for intra- and interaural listening conditions. Subjects with hearing losses tended to be less consistent in pitch judgments than normal-hearing subjects. These findings were interpreted to mean that bilaterally symmetrical hearing losses increase the incidence of pitch aberrations.
对7名听力正常的受试者和7名患有轻度双侧高频感音神经性听力损失的受试者进行了研究，以探究双耳音调差异的存在情况。音高判断采用了心理物理学调整极限追踪程序，而非传统的调整方法。向每位受试者呈现一个标准的4000赫兹纯音，持续500毫秒，然后交替呈现一个可变音调，持续500毫秒。受试者被要求向上或向下调整可变音调的音高，使其与标准音调的音高感觉相匹配。研究了两种耳内和两种耳间聆听条件。针对每种条件，获取了受试者对可变音调调整的图形表示。由此得到的轨迹显示了与音高调整相关的频率，据此计算出偏移宽度和恒定误差。发现一些听力受损的受试者和一名听力正常的受试者存在双耳音调差异。听力损失受试者在耳内和耳间聆听条件下表现出更大的偏移宽度。与听力正常的受试者相比，听力损失受试者在音高判断上往往不太一致。这些发现被解释为双侧对称听力损失会增加音高畸变的发生率。
