Validation experiment for structural power

The evaluation of structure-borne sound power is an effective analysis tool for the analysis of the structure-borne sound transmission in mechanical structures like vehicles, but also for the characterization of components. However in the case of measurement-based methods in particular the phase-accuracy becomes challenging for lightly damped systems vibrating at non-resonant frequencies. In order to enable the measurement of power quantities for such cases a method is discussed incorporating a frequency-dependent phase correction. The latter is predetermined in a small test setup solely for the impedance heads as these introduce the largest phase errors in the measurement chain. The evaluated impedance heads are used for the evaluation of power quantities at an example structure afterwards. Applying the phase correction a significant improvement of the resulting power quantities is finally achieved.