  One of the biggest mystery of the recent observation of cosmic microwave
background anisotropies by the boomerang team is insignificance of the second
acoustic peak in the angular power spectrum. It is very difficult to explain
such a low amplitude without assuming the higher baryon density than predicted
by the Big Bang Nucleosynthesis (BBN). Employing the double inflation model in
supergravity, we show that the density fluctuations produced by this inflation
model can produce a sufficient low second acoustic peak with the standard value
of the baryon density from BBN. It is shown that these density fluctuations are
also consistent with the observations of cluster abundances and galaxy
distributions.
