A new functional method of parameter estimation for the energy acoustic system based on an Lxevaluation criterion

Recently, for the purpose of reducing a residential environmental noise, many sound insulation systems are often improved acoustically by changing their geometrical scales and/or acoustical characteristics. In this paper, new functional evaluation and probabilistic prediction methods for the energy acoustic system are theoretically and experimentally proposed in practical expression forms by introducing a few functional parameters. These functional parameters are supported by many of physically structural factors in close relation to the well-known statistical energy analysis method, and are easily estimated in a preliminary experiment. The estimation procedures are found out, especially using the actual overall frequency band data, based on an Lxevaluation criterion which matches to the actual situation of estimating the representative evaluation indices, Finally, by using the actual musical sound as an input noise, the effectiveness of the proposed method is experimentally confirmed by applying it to some actual problems.