Figure 11

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Consideration of damping properties. (a) Average internal loss factors on a one-third octave band basis. ηn: Power Injection Method (PIM). 2ζn: EMA modal damping ratios. η̅$ \overline{\eta }$: PIM loss factor averaged from 100 Hz to 1600 Hz, η̅=0.0167$ \overline{\eta }=0.0167$. (b) Average one-third octave band transfer mobility difference, ΔL|Y|2̅$ \Delta {L}_{\overline{{\left|Y\right|}^2}}$. e(η): Difference in simulation when using one-third octave band loss factor instead of η̅$ \overline{\eta }$. e(2ζ): Difference in simulation when using modal loss factors instead of η̅$ \overline{\eta }$. e(L|Y|2̅)$ e\left({L}_{\overline{{\left|Y\right|}^2}}\right)$: Difference between experiment and simulation for the first five eigenmodes.

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