Sohmer H, Pratt H
Electroencephalogr Clin Neurophysiol. 1977 Apr;42(4):493-500. doi: 10.1016/0013-4694(77)90212-7.
Frequency following responses (FFRs) to monaural tone bursts were recorded in normal and hearing impaired subjects as the potential difference between an ipsilateral earlobe electrode and a scalp vertex electrode. Whenn the rubber tube coupler between the earphone and the subject's ear was clamped, a stimulus artefact FFR was occasionally recorded. The "biological" FFR had a latency of about 1 msec and an irregular wave form which was made more sinusoidal by the addition of white noise. When the responses to tone bursts of opposite onset phases were added together, a "double frequency" FFR was obtained which had a latency of about 6 msec and whose amplitude was appreciably reduced by white noise. In some hearing impaired subjects (with no neural responses to clicks), this longer latency double frequency component could not be recorded, while in those cases in which the cochlear microphonic potential could be recorded, the shorter latency FFR was also present. It is concluded that the FFR in normally hearing subjects is made up of a short latency cochlear microphonic component and a longer latency neural component.
在正常受试者和听力受损受试者中，记录了对单耳短纯音的频率跟随反应（FFR），作为同侧耳垂电极与头皮顶点电极之间的电位差。当耳机与受试者耳朵之间的橡胶管耦合器被夹住时，偶尔会记录到刺激伪迹FFR。“生物性”FFR的潜伏期约为1毫秒，波形不规则，通过添加白噪声使其更接近正弦波。当将对相反起始相位的短纯音的反应相加时，可获得“双频”FFR，其潜伏期约为6毫秒，其幅度会被白噪声明显降低。在一些听力受损受试者中（对滴答声无神经反应），无法记录到这种较长潜伏期的双频成分，而在那些可以记录到耳蜗微音器电位的情况下，也存在较短潜伏期的FFR。结论是，正常听力受试者的FFR由短潜伏期的耳蜗微音器成分和长潜伏期的神经成分组成。
