Driving point reveals whether a resonance peak is isolated or overlapping
Evidence
One way to tell whether a given peak in power or admittance is an isolated resonance is to drive the system at the resonance frequency from different locations. As long as the locations are not too close to a nodal line of the resonant mode, an isolated resonance springs to life as the same pattern of vibration (mode) over the whole object, independent of the driving point. If, however, the modes are strongly overlapping, the combination of them that is generated varies from one driving point to the next. The pattern of vibration will depend on the driving point. — Eric J. Heller, Why You Hear What You Hear- An…, 1152
Categorization
Category: Craft and Method
- QUESTION: This is a practical experimental test — could a simple listening experiment demonstrate overlapping vs isolated modes?
Related
- Driving-point independence reveals isolated resonances, while overlap makes vibration patterns location-dependent (similarity 0.93)
- A resonance’s strength depends on where you drive it, not just its frequency. (similarity 0.82)
- A resonance’s strength depends on where you strike it, not on the mode alone (similarity 0.81)
- Power fluctuations persist even where resonances overlap completely (similarity 0.81)