We know that when the off time of the Bekesy interrupted signal was lengthened from conventional 200 to 800 msec, the tendency of nonorganic patients to trace the type V pattern was dramatically enhanced. Therefore, in this study authors evaluated 40 persons with normal hearing with fixed frequency Bekesy audiometry using 0.25 and 1.0 sec on/off time interrupted tone and continuous tone tracing for the detection of malingering. The results were obtained as follows ; 1) Normal hearing threshold was below 10 dB in all frequency in all type tracing. 2) According to by Hopkinson's criteria, the detection rate of nonorganicity in 0.25 sec on/off time interrupted and continuous tone was 50.8% and the detection rate of nonorganicity in 1.0 sec on/off time interrupted and continuous tone was 89.2%. 3) The arbitrary threshold gap between 0.25 sec on/off time interrupted tone and continuous tone was 5.75±0.87, 7.33±0.67 and 5.13±0.89 dB respectively in each 500, 1000 and 2000 Hz. And the arbitrary threshold gap between 1.0 sec on/off time interrupted tone and continuous tone was 10.20±0.75, 10.38±0.69 and 9.58±1.0 dB respectively in each 500, 1000 and 2000 Hz. 4) The arbitrary threshold gap of 1.0 sec on/off time interrupted tone was larger than that of 0.25 sec on/off time interrupted tone as 4.45±0.55, 3.05±0.65 and 4.45±0.59 dB respectively in each 500, 1000 and 2000 Hz. 5) With above results authors concluded that the modified LOT test was as good as LOT test in malingering test.