Some noise cancellation and prediction methods on the response probability distribution form for complicated sound wall systems with background noise

摘要

in the actual situation of measuring an environmental noise, it is very often that only the resultant stochastic fluctuation contaminated b an additional noise of arbitrary dis- tribution type can be observed. In this paper at first a noise cancellation for reasonable removing the effect of the above additional noise, especially in a whole probability distri- bution form, is derived theoretically in order to estimate only the undisturbed objective output response. Next, for the purpose of predicting a whole expression from o the out- put response probability of an acoustic system excited by an arbitrary stochastic input with the additional noise, a new stochastic signal processing method, reflecting the effect of the additional noise fluctuation, is proposed in a whole probability distribution from.