High-Q resonances are problematic because they lock onto exact frequencies

Evidence

The long life of the vibrations imply high-Q resonances. But isolated high-Q soundboard resonances are problematic. Such resonances are very “sure” of their frequency, by the uncertainty principle. The strings are also high Q resonators (they hold their vibration for a long time) and very sure of their frequency (or frequencies, including the upper partials). The bridge lying partway across the soundboard couples the two. — Eric J. Heller, Why You Hear What You Hear- An…, 1168