通风机房噪声模型的建立及分析

应用系统控制理论,建立通风机房噪声控制模型.在扩散声场假设条件下,采用系统学、统计学等方法来处理室内声场,避免了繁杂的数学推导.经布点监测验证,利用该模型计算通风机房噪声,预测值和实验值比较吻合,误差(ψ)在0.10～1.92 dB,平均误差为1.04 dB,模型在通风机房噪声控制是适用的.

Establishing and Analysis of the Noise Model in the Ventilation Room

The noise-controlling model in the ventilation room is established using control theroy of system. Supposing that the condition of diffusive sound field is known, a method to handle room sound field is given to avoid the complicated mathematical derivation, using system theory and statistics. Moreover, after the validation of monitoring sites, the noise -controlling model is used to calculate the noise in the ventilation room, the result of which shows that the preditive value nearly agrees with the experimental one, with the error between 0, 10 and 1.92 dB and the average error 1.04 dB. The result of which shows that the preditive value nearly agrees with the experimental one, with the error between 0-10 and 1.92 dB and the average error 1.04 dB. It is proven that the model is suitable for the noise-controlling in the ventilation room.