It was investigated by a computer simulation of the cochlea whether latencies of evoked otoacoustic emissions (e-OAE) could be accounted for in terms of reflections of travelling waves on the basilar membrane. One dimensional model of the cochlea was solved by finite difference method and phase velocities were calculated for sinusoidal inputs with four different frequencies to the oval window. Impulse responses at characteristic places of the basilar membrane for the same four frequencies were also calculated using inverse Fourier transform of frequency response at each point. The results revealed that no simple reflection could explain the latency of e-OAE and several mili-seconds of delay should exist somewhere before the reflection showed up as emissions.