Lingual vibrotactile thresholds were obtained from 10 adult subjects using five different clamping procedures at three test frequencies. Data indicated that the elimination of the bottom clamp will lead to thresholds comparable to those involving the use of a bottom clamp, provided that the amount of lingual constriction is carefully monitored. Elimination of the lower clamp is desirable in that it simplifies overall procedure for the experimenter and the subject being tested. Future research relating frequency response characteristics to individual clamping conditions is suggested.