Secondly, some peaks are so weak, usually the Sls,that their energies are less than the threshold and they areabout to get lost. These weak peaks definitely need to be found, too. To do this, we still examine the intervals between the adjacent peaks. When the interval excds the high-level time limit, it is assumed that a peak has been lost and the threshold will be decreased by a certain amount. This reduction of the threshold will be iterated until the losing peaks are picked up or the iteration limit is reached. Here the above criteria to eliminate the extra peaks are used again to delete all “extra” peaks picked up in the procedure of finding lost ones. Fig.4 shows the “lost” peaks are found again. The third problem is caused by the artifacts, that look like real peaks both in time interval anid amplitude and can’t be discarded using the methods created for extra peaks. They will be rejected in the following process.