Abstract
There were significant differences in transmissibility between four different compositions of polyurethane foam when tested as rectangular-shaped samples, seats without covers and seats with covers. The sample geometry affected the resonance frequency, but not the transmissibility at resonance. In contrast, the seat cover mainly affected the transmissibility at resonance rather than the frequency of resonance. There were significant correlations for both the transmissibility and the frequency at resonance between the three different conditions of sample, except for the resonance frequency between the rectangular samples and the seats with covers. Vibration transmission ratios were affected by foam composition, sample geometry and the seat covers.