Bacon S P, Brandt J F
J Speech Hear Res. 1982 Sep;25(3):339-47. doi: 10.1044/jshr.2503.339.
"Masking" patterns were obtained in normal-hearing and hearing-impaired listeners using the pulsation-threshold procedure. Synthesized vowel maskers /a/ and /ae/ were presented at various sound pressure levels and alternated witha sinusoidal probe of a given frequency at a repetition rate of 4 Hz, T = 250 msec. Simultaneous-masking patterns also were obtained in one normal-hearing listener. The vowel pulsation patterns (VPPs) for the normal-hearing listeners closely resembled the acoustic spectra of the vowel maskers. Neither the pulsation patterns for the hearing-impaired listeners nor the simultaneous-masking patterns for the normal-hearing listener preserved the contour of the vowel spectra. These results are interpreted in terms of suppression effects, which have been observed only with nonsimultaneous-masking paradigms in normal-hearing listeners and have not been observed in listeners with a cochlear hearing loss. The effects of increased masker level were the same for both groups of listeners and are discussed in terms of upward spread of masking and a masking function with a slope less than 1.0.
使用脉动阈值程序，在听力正常和听力受损的听众中获得了“掩蔽”模式。合成元音掩蔽音/a/和/ae/以不同的声压级呈现，并以4Hz的重复率（T = 250毫秒）与给定频率的正弦探测音交替出现。还在一名听力正常的听众中获得了同时掩蔽模式。听力正常听众的元音脉动模式（VPPs）与元音掩蔽音的声谱非常相似。听力受损听众的脉动模式和听力正常听众的同时掩蔽模式均未保留元音谱的轮廓。这些结果是根据抑制效应来解释的，抑制效应仅在听力正常的听众的非同时掩蔽范式中观察到，而在患有耳蜗性听力损失的听众中未观察到。掩蔽音水平增加对两组听众的影响相同，并根据掩蔽的向上扩展和斜率小于1.0的掩蔽函数进行了讨论。
