Turner C W, Van Tasell D J
J Acoust Soc Am. 1984 Feb;75(2):562-5. doi: 10.1121/1.390528.
It has been hypothesized that the wider-than-normal auditory bandwidths attributed to sensorineural hearing loss lead to a reduced ability to discriminate spectral characteristics in speech signals. In order to investigate this possibility, the minimum detectable depth of a spectral "notch" between the second (F2) and third (F3) formants of a synthetic vowel-like stimulus was determined for normal and hearing-impaired subjects. The minimum detectable notch for all subjects was surprisingly small; values obtained were much smaller than those found in actual vowels. An analysis of the stimuli based upon intensity discrimination within a single critical band predicted only small differences in performance on this task for rather large differences in the size of the auditory bandwidth. These results suggest that impairments of auditory frequency resolution in sensorineural hearing loss may not be critical in the perception of steady-state vowels.
有假设认为，感音神经性听力损失所导致的听觉带宽比正常情况更宽，会降低辨别语音信号频谱特征的能力。为了研究这种可能性，针对正常受试者和听力受损受试者，测定了合成元音样刺激的第二共振峰（F2）和第三共振峰（F3）之间频谱“凹口”的最小可检测深度。所有受试者的最小可检测凹口出奇地小；获得的值比实际元音中的值小得多。基于单个临界带内强度辨别对刺激进行的分析预测，对于听觉带宽大小的相当大差异，该任务的表现只有很小的差异。这些结果表明，感音神经性听力损失中听觉频率分辨率的损害在稳态元音的感知中可能并不关键。
