A trial of evaluation for actual environmental indoor-outdoor acoustic system- a model-adaptive identification method and prediction method

摘要

For the evaluation of actual environmental acoustic systems between inside and outside of the room, a new method predicting its system response probability distribution is proposed. More concretely, first, the extended regression functions (of involution) of the output on intensity scale are introduced as the system model matched to the prediction. To identify these system parameters, the recursive algorithm based on the criteria that there remains only accidental fluctuation in the model error when they are chosen optimally is newly derived. Since the parameters of the general form of the conditional probability distribution conditioned by input are determined, the expression of the probability distribution of the output without contamination of background noise derived from this can be employed for prediction with a new input. Finally, the proposed method is experimentally confirmed by applying it to actual indoor-outdoor acoustic system.