Davis H, Hirsh S K, Turpin L L, Peacock M E
Audiology. 1985;24(1):54-70. doi: 10.3109/00206098509070097.
Frequency-specific electric response audiometry can be performed on difficult to test young children if the child is sedated and proper choices are made of acoustic stimuli and recording parameters, although certain compromises are necessary. A very satisfactory sedative is secobarbital, administered intramuscularly in doses related to the weight of the child. As stimuli we recommend '2-1-2' tone bursts at 500, 1 000, 2 000, and 4 000 Hz: i.e., with a rise and fall of two periods and a plateau of one period of the modulated tone. A very robust and sensitive response that is not significantly modified by the sedation and is effective for all four frequencies is the P6-SN10 of the early brainstem sequence. To record this complex favorably requires a bandpass input filter of the Butterworth type with pass-band (at -3 dB) from 50 to 1 700 Hz and rejection rates of 24 dB/octave. With this combination, polarity of stimulus is unimportant and sweep time, rate of stimulation and number of responses averaged may be selected for convenience and simplicity. A routine that requires about an hour of testing time is described and the necessary correction factors are given for estimating a child's behavioral pure-tone thresholds. We believe that our threshold estimates are generally correct within 10 dB, and are sufficiently frequency-specific for proper selection of a hearing aid.
如果对难以测试的幼儿进行了镇静处理，并正确选择了声刺激和记录参数，那么尽管需要做出某些妥协，但仍可进行频率特异性电反应测听。一种非常令人满意的镇静剂是司可巴比妥，通过肌肉注射给药，剂量与儿童体重相关。作为刺激，我们推荐在500、1000、2000和4000赫兹处采用“2-1-2”音爆：即，调制音有两个周期的上升和下降以及一个周期的平稳段。早期脑干序列的P6-SN10是一种非常稳健且敏感的反应，不会因镇静而显著改变，并且对所有四个频率都有效。为了良好地记录这个复合体，需要一个巴特沃斯型带通输入滤波器，其通带（-3分贝处）为50至1700赫兹，抑制率为24分贝/倍频程。采用这种组合时，刺激的极性并不重要，可以为了方便和简化而选择扫描时间、刺激速率和平均反应次数。本文描述了一个大约需要一小时测试时间的程序，并给出了用于估计儿童行为纯音阈值的必要校正因子。我们认为，我们的阈值估计通常在10分贝范围内是正确的，并且对于正确选择助听器具有足够的频率特异性。
