Damping factors of honeycomb sandwich panels are key factors for the high-frequency dynamic response.The damping factors are not accessible from the theoretical route.They can be achieved by obtaining the real part of velocity mobility when in testing.Steady stimulation techniques were adopted for determination of damping factors of honeycomb sandwich panels in this paper.Comparison between the equally bandwidth averaging and 1/3 octave bandwidth was made to consider the statistical error of testing. Experi...