Abstract
For evaluating the acoustic systems in the actual measurement environment, it is inevitable to consider the effects of additive background noise. Nevertheless, the non-Gaussian characteristics of energy acoustic signals and the nonlinear observation mechanism often bias the estimates of unknown acoustic signals, as well as the randomly fluctuating background noise. In this paper, a new type of wide sense digital filer has been proposed for detecting acoustics signals with use of decibel observations, based on the expanded characteristic functions of Mellin and Lapace transform types and the orthogonal projection theorem. The proposed algorithm will be experimentally confirmed.
