Reroń E, Sekuła J, Szayna M
Otolaryngol Pol. 1994;48(5):466-72.
Fourier analysis (FFT) of auditory brain stem responses induced by stimuli of 90, 70 and 40 dB HL was carried out in group of 45 full-term and pre-term neonates. It was stated that with postnatal newborn's development complex IV/V was observed more frequently for the more immature newborn. It influences also the power strength spectrum obtained. In responses with IV/V complex the frequency range is considerable and significantly reduced by about 100-200 Hz. It was observed that general state of newborn at the birth influences the frequency range as well as from the shape of score reproducibility and reliability of spectrum is significantly better. It was noticed also that the shape and form of spectrum in about threshold and threshold responses is significantly similar irrespective of the intensity of threshold stimulus. The shape and form of responses spectra for stimuli of 30-40 dB HL (in a group of children with normal hearing) and of 80-90 dB HL (in a group of children with severe hearing impairment) are identical. The above findings allow us to show the importance of Fourier analysis for objectivisation of subjective evaluation of auditory brain stem responses.
对45名足月儿和早产儿进行了90分贝听力级（dB HL）、70分贝听力级和40分贝听力级刺激诱发的听觉脑干反应的傅里叶分析（快速傅里叶变换）。结果表明，随着新生儿出生后的发育，对于更不成熟的新生儿，IV/V复合波更频繁地被观察到。这也影响了所获得的功率强度谱。在有IV/V复合波的反应中，频率范围相当大，并且显著降低了约100 - 200赫兹。观察到新生儿出生时的一般状况影响频率范围，并且从频谱的得分再现性和可靠性的形状来看，情况要好得多。还注意到，无论阈值刺激的强度如何，大约阈值和阈值反应中的频谱形状和形式都显著相似。30 - 40分贝听力级刺激（在一组听力正常的儿童中）和80 - 90分贝听力级刺激（在一组重度听力障碍的儿童中）的反应频谱形状和形式是相同的。上述发现使我们能够表明傅里叶分析对于听觉脑干反应主观评估客观化的重要性。
