Kim, Tae Min and Kim Jeung Tae
International Journal of Railway, vol. 4, no. 1, pp.19-27, 2011

Abstract : Many studies are currently in progress regarding improving the railway vehicle’s performance and comfort such as speed, weight and noise. Improving the structural characteristics of the vehicle’s with respect to noise proofing is con¬sidered important for reducing noise disturbance, but measuring transmission loss would entail large costs. Thisstudy explores an alternative method for estimating and measuring the railway vehicle’s transmission lossbased on applying the numerical analysis and scaled reverberation chamber in tandem. The transmission loss measurement using scaled reverberationchamber was performed after the compensation value was found through 1mm thickness(1t) specimen. For numerical analysis,a commercially available acoustics solver VA ONE was used. The proposed method is found to lead to transmission loss measurement comparable to the measurements based on large-scale reverberation chamber. Thus, it can be argued that a reliable method has been developed for measuring railway vehicle’s transmission loss.

Keyword : Transmission loss, Honeycomb panel, Small reverberation chamber, Local resonance, High speed train