Driving a sounding board near a clamped edge produces antiresonance

Evidence

The NFC mechanism was well understood by Lord Rayleigh. However, it seems that ever since Rayleigh, the usual casual explanations, something like “there is a resonator near a source and it resonates! Resonators get loud on resonance!” have gradually dulled the mind and the level of understanding. The difficulty with the casual statement is that it is not an explanation, and, worse, it is false in some circumstances. For example, there can be a suppression of the sound if a monopole source, instead of a dipole or quadrupole source, is brought near the resonator. Capture, phase shifting, and reradiation still occurs, but now the phase-shifted, reradiated sound finds itself more or less destructively interfering with the direct sound from the monopole, depending on its distance to the resonator. It is quite shocking to hear this failure if one believes that any sound source should be amplified by proximity to a resonator. Dramatic amplification follows only from breaking a short-circuiting sound source. — Eric J. Heller, Why You Hear What You Hear- An…, 1889 (#corroborates, via linked claim)

Categorization

• XREF: connects to: Proximity to a resonator suppresses, rather than amplifies, monopole sound sources — Eric J. Heller, Why You Hear What You Hear- An…, 1889; Sounding boards do not amplify every frequency via resonance; A piano soundboard is reverberant, not resonant, above 500 Hz

Related

• Sound near walls or large vessels is enhanced by scattering regardless of resonator tuning (similarity 0.86)
• Proximity to a resonator suppresses, rather than amplifies, monopole sound sources (similarity 0.86)
• Sounding boards do not amplify every frequency via resonance (similarity 0.82)
• Dipole sources amplify through near-field capture, phase shift, and reemission by a resonator (similarity 0.82)
• Marimba resonators amplify sound by capturing near-field energy that would otherwise short-circuit (similarity 0.80)
• Resonators amplify sound by capturing near-field energy and reradiating it with a phase shift (similarity 0.80)
• Resonance can amplify desired sound or cause harmful machine vibration (similarity 0.79)
• Soundboards deliberately avoid isolated high-Q resonances (similarity 0.79)
• Sound instruments must balance confinement against letting sound escape (similarity 0.79)
• Soundboards are designed to minimize short-circuiting by lowering critical frequency (similarity 0.79)
• Confinement reflections amplify sources only when wave sign is preserved (similarity 0.78)
• High-Q resonances are problematic because they lock onto exact frequencies (similarity 0.78)

Broader Connections

• Proximity to a resonator suppresses, rather than amplifies, monopole sound sources #corroborates (0.85) — Eric J. Heller, Why You Hear What You Hear- An…, 1889
• Sounding boards do not amplify every frequency via resonance #expands (0.82)