Suzuki T, Hirabayashi M, Kobayashi K
Ann Otol Rhinol Laryngol. 1984 May-Jun;93(3 Pt 1):267-70. doi: 10.1177/000348948409300316.
Effects of analog high pass (HP) filtering were compared with those of zero phase-shift digital filtering on the auditory middle latency responses (MLR) from nine adults and 16 young children with normal hearing. Analog HP filtering exerted several prominent effects on the MLR waveforms in both adults and young children, such as suppression of Po (ABR), enhancement of Nb, enhancement or emergence of Pb, and latency decrements for Pa and the later components. Analog HP filtering at 20 Hz produced more pronounced waveform distortions in the responses from young children than from adults. Much greater latency decrements for Pa and Nb were observed for young children than for adults in the analog HP-filtered responses at 20 Hz. A large positive peak (Pb) emerged at about 65 ms after the stimulus onset. From these results, the use of digital HP filtering at 20 Hz is strongly recommended for obtaining unbiased and stable MLR in young children.
对9名听力正常的成年人和16名幼儿的听觉中潜伏期反应（MLR），比较了模拟高通（HP）滤波和零相位数字滤波的效果。模拟HP滤波对成人和幼儿的MLR波形都产生了几个显著影响，比如抑制Po（听觉脑干反应）、增强Nb、增强或出现Pb，以及Pa和后续成分的潜伏期缩短。20 Hz的模拟HP滤波在幼儿反应中产生的波形失真比成人更明显。在20 Hz的模拟HP滤波反应中，幼儿的Pa和Nb潜伏期缩短比成人更显著。刺激开始后约65毫秒出现一个大的正峰（Pb）。根据这些结果，强烈建议在幼儿中使用20 Hz的数字HP滤波来获得无偏差且稳定的MLR。
