Acoustic reflex and reflex decay results for 58 patients having Meniere's disease and for 58 patients having VIIIth nerve tumors were reviewed. Reflex decay was analyzed relative to decay in the first 5 sec as suggested by Anderson et al. (2) and over the full 10 sec of the stimulus as described by Jerger et al. (5). When reflex decay was observed, decay to one-half or less amplitude almost always occurred during the first 5 sec of the 10-sec stimulus.