Bernstein L E, Schechter M B, Goldstein M H
J Acoust Soc Am. 1986 Jul;80(1):118-23. doi: 10.1121/1.394172.
Three experiments were performed to obtain vibrotactile sensitivity thresholds from hearing children and adults, and from deaf children. An adaptive two-interval forced-choice procedure was used to obtain estimates of the 70.7% point on the psychometric sensitivity curve. When hearing children of 5-6 and 9-10 years of age and adults were tested with sinusoids and haversine pulse stimuli, at 10, 100, 160, and 250 Hz or pps, respectively, only the 10-Hz stimulus resulted in an age effect. For this stimulus, young children were significantly less sensitive than adults. When sinusoids were again tested at 20, 40, 80, and 160 Hz, a small overall effect of age was observed with a significant effect only at 20 Hz. Two prelingually profoundly deaf children were tested with haversine pulse trains at 10, 50, 100, 160, and 250 pps. Both children were at least as sensitive to the tactile stimulation as were the hearing children and adults. Pulsatile stimulation, compared to sinusoidal stimulation, exhibited relatively flat threshold versus frequency functions. The present results, demonstrating no age effect for pulsatile stimulation and similar performance for deaf and hearing children, suggest that pulsatile stimulation would be appropriate in vibrotactile speech communication aids for the deaf.
进行了三项实验，以获取听力正常的儿童和成人以及聋童的振动触觉敏感度阈值。采用自适应双间隔强迫选择程序来获取心理测量敏感度曲线上70.7%点的估计值。当分别用正弦波和哈弗正弦脉冲刺激对5至6岁、9至10岁的听力正常儿童、成人以及聋童进行测试时，频率分别为10、100、160和250赫兹或脉冲每秒，只有10赫兹的刺激产生了年龄效应。对于这种刺激，幼儿的敏感度明显低于成人。当再次以20、40、80和160赫兹测试正弦波时，观察到了较小的总体年龄效应，且仅在20赫兹时有显著效应。用10、50、100、160和250脉冲每秒的哈弗正弦脉冲序列对两名语前极重度聋童进行了测试。这两名儿童对触觉刺激的敏感度至少与听力正常的儿童和成人一样。与正弦波刺激相比，脉冲刺激的阈值与频率函数表现得相对平稳。目前的结果表明，脉冲刺激不存在年龄效应，且聋童和听力正常儿童的表现相似，这表明脉冲刺激适用于聋人的振动触觉言语交流辅助设备。
