Burrows D L, Barry S J
Department of Communication Disorders, University of Oklahoma Health Sciences Center, Oklahoma City 73190.
J Acoust Soc Am. 1990 Jul;88(1):180-4. doi: 10.1121/1.399938.
Electrophysiological evidence for the critical band phenomenon in humans using event-related potentials has been sought for many years with conflicting results. Components Na and Pa of the middle-latency response (MLR) and wave V of the auditory brain-stem response (ABR) were simultaneously recorded in response to a two-tone complex varying in bandwidth from 76 Hz to 1012 Hz, centered at 2 kHz, and presented at an overall level of 85 dB SPL, in ten normal female subjects. Only the amplitude of Na showed an abrupt increase as bandwidth changed from 268 to 330 Hz, yielding an estimate of critical bandwidth in good agreement with previous behavioral estimates.
多年来，人们一直在寻找使用事件相关电位来证明人类临界带现象的电生理证据，但结果相互矛盾。在10名正常女性受试者中，以2 kHz为中心，带宽从76 Hz到1012 Hz变化的双音复合音，以85 dB SPL的总声压级呈现，同时记录中潜伏期反应（MLR）的Na和Pa成分以及听觉脑干反应（ABR）的V波。只有Na的振幅在带宽从268 Hz变为330 Hz时出现突然增加，得出的临界带宽估计值与先前的行为估计值高度一致。
