Thümmler I, Tietze G, Matkei P
Scand Audiol. 1981;10(4):255-9. doi: 10.3109/01050398109076189.
Investigations, using click stimuli masked by wide-band and high-pass filtered noise with cut-off frequencies of 2 600, 1 250 and 850 Hz were carried out. The latency shift of a response evoked by a click of 60 dB HL and wide-band masking at 80 dB HL is 0.2 - 0.3 ms for wave I and about 0.6 ms for wave V. The results obtained with high-pass masking at various cut-off frequencies differ distinctly from those found by other authors. For instance, when using high-pass masking noise of a lower limiting frequency of 850 Hz and levels of 85 and 90 dB no clear brain-stem responses were discernible. Therefore, the appearance of the brain-stem responses with masking noise at various frequency limits and at various levels was examined. With high-ass noise masking at decreasing cut-off frequencies from 1 800 Hz down to 600 Hz and increasing noise levels, wave V disappears with a slight latency shift, but subsequently to wave V an additional wave occurs which remains stable even in the case of high noise intensities. Further studies are necessary to clarify the properties of this additional wave.
研究采用截止频率为2600Hz、1250Hz和850Hz的宽带和高通滤波噪声掩盖的点击刺激进行。60dB HL的点击和80dB HL的宽带掩蔽所诱发反应的潜伏期偏移，I波为0.2 - 0.3ms，V波约为0.6ms。在不同截止频率下进行高通掩蔽所获得的结果与其他作者的结果明显不同。例如，当使用下限频率为850Hz、强度为85dB和90dB的高通掩蔽噪声时，无法清晰辨别脑干反应。因此，研究了在不同频率极限和不同强度下使用掩蔽噪声时脑干反应的出现情况。随着高通噪声掩蔽的截止频率从1800Hz降至600Hz且噪声强度增加，V波消失，潜伏期略有偏移，但在V波之后会出现一个额外的波，即使在高噪声强度情况下该波仍保持稳定。需要进一步研究以阐明这个额外波的特性。
