窄带动作电位是指窄带(例如半个倍频程)的声音刺激所引起的听神经动作电位(AP)。作者在有噪声掩蔽的情况下记录宽频短声所引起的AP,掩蔽声为高通噪声,其截止频率可变。若在截止频率相差半个倍频程的两种高通噪声掩蔽下分别叠加(次数相等)短声所引起的AP,然后将两次结果相减,便得到相当于该半个倍频程的窄带AP。AP的记录用标准的耳蜗电图引 Narrow band action potentials refer to auditory nerve action potentials (APs) caused by sound stimulation in a narrow band (eg, a half octave). The author records the AP caused by the broadband short-sound when the noise is masked, and the masking sound is a high-pass-noise, whose cut-off frequency is variable. If the cut-off frequency by a half-octave two kinds of high-pass noise masking were superimposed (the same number of times) AP caused by short-sound, and then subtract the two results, we get the equivalent of the half-octave band AP. The recording of AP is guided by the standard cochlear electrogram