抄録
A 19-year-old woman student had sudden hearing loss following attendance at a rock-and-roll music concert. She received the usual treatment for sudden sensorineural hearing loss, and moderate recovery of hearing was achieved.
Electrocochleograms were recorded in both the early and late stages of her illness. In the early period, the amplitude of AP was relatively high at intense sounds. The input-out-put curve of AP was sharp, and AP disappeared suddenly at the threshold of the hearing level. In the late period, a high amplitude of AP at intense sounds, a sharp input-output curve of AP and sudden disappearance of AP at the threshold of hearing level were observed. The threshold of hearing level where AP disappeared in the late period was lower than that in the early period.
