Resonant confinement can backfire when internal dissipation exceeds radiation loss
Evidence
The battle being fought here between resonance and nonproductive friction is of real consequence for musical instruments and other sound sources. Bottom line: If we keep sound partially confined, it can be resonantly enhanced and become even louder, but more confinement in an attempt to take advantage of resonance may backfire if the sound is being dissipated internally before it gets a chance to leave. Figure 10.10 shows the result of this competition. — Eric J. Heller, Why You Hear What You Hear- An…, 1053
Categorization
Category: Causal Relationships
- XREF: Connects to the physics of why string/woodwind instrument body design (e.g., violin sound holes) reflects this exact radiation-versus-friction tradeoff.
- SEED: A possible accessible explainer: ‘Why can’t you just make an instrument louder by confining sound more?’ framed around the waxing/waning regions.
Related
- Over-confining sound in resonators can backfire through internal dissipation. (similarity 0.91)
- Sound instruments must balance confinement against letting sound escape (similarity 0.90)
- Wall friction and resonance oppose each other in determining instrument sound radiation. (similarity 0.86)
- Audible resonance requires balancing energy confinement against energy leakage (similarity 0.85)
- Confining reflected sound can radiate more power than an open bell on resonance. (similarity 0.83)
- Resonant power dissipation actually grows when damping decreases (similarity 0.83)
- Resonance energy storage alone cannot explain a brass instrument’s loudness (similarity 0.82)
- Maximum sound output requires balancing radiation loss against internal friction (similarity 0.81)
- A violin string clamped between steel walls would radiate almost no sound (similarity 0.81)
- Confining a vibrating source makes it radiate louder sound (similarity 0.80)
- Total damping equals neck friction plus radiated sound, with friction dominant (similarity 0.80)
- Sound diffracts strongly only when wavelengths exceed opening size (similarity 0.80)
- On resonance, releasing sound reduces its loudness (similarity 0.80)
- Resonance can amplify desired sound or cause harmful machine vibration (similarity 0.80)
- A speaking-trumpet flare can boost lower frequencies when wall dissipation dominates resonance enhancement. (similarity 0.79)
Broader Connections
- Maximum sound output requires balancing radiation loss against internal friction
#corroborates(0.90) — Eric J. Heller, Why You Hear What You Hear- An…, 1051 - Adding damping to a resonance paradoxically makes it more audible by widening its bandwidth
#expands(0.80) — Toole, Floyd E, Sound reproduction- the acoustics and…, 498