  We investigate the effects of spin fluctuations on the tunneling spectra of
the NS junction. In the high junction resistance limit, the dip/hump structure
observed in ARPES data for the high Tc superconductors is reproduced in a RPA
treatment of the t-t'-J model. It is shown that the dip/hump structure weakens
as doping increases as reflected in the data. In the other limit, we predict
that the zero bias Andreev peak can coexist with the dip/hump structure.
Furthermore, the c-axis tunneling spectra is found to be very similar to a
recent STM data once these fluctuations are included.
