伝達経路解析を用いたエアハンドリングユニットの騒音源特定と対策

抄録

In this study, we attempted the noise reduction of an air handing unit model considering the contribution of each part. By applying operational transfer path analysis, the radiated noise at around motors were found to have high contribution to the response point (front side noise) around 200 Hz band. Furthermore, the resonance in the motor unit case was clarified to be the main factor. Then, for the reduction of the motor noise in the unit, a plastic plate was inserted to separate the inside volume. As the result, the unit radiated noise at 200 Hz band could be decreased well.