Except the dominant frequency and interpulse interval, all the other parameters of the callsemitted during flying were higher than those of calls emitted during hanging.

We studied the characteristics of dominant frequency of infinite horizontal cylinder in compensated factor and quve the linear compensation way of two-dimensional bodies.

We make a subtly geological model profile in Sanzhao sag in Songliao basin, then we can make a series of models with varies S/N ratios and with varies dominant frequency accordingly.