Helmholtz resonance is the trapped-air cavity resonance exploited in perforated-panel absorbers
Evidence
A Helmholtz resonator is a cavity-type resonator, so constructed that it will vibrate only at a particular frequency. It was developed by the German physicist Hermann Helmholtz in the nineteenth century to analyze the harmonic components of complex sounds. — Schafer, Murray R, The Soundscape- Our Sonic Environment…, 920 (
#exemplifies, via linked claim)
Categorization
- XREF: connects to: An open car window creates a living Helmholtz resonator with strong low-frequency pressure fluctuations; Trapped compressible air and moving air form a mass-spring acoustic resonator; Blowing across a bottle mouth produces a Helmholtz resonance (+3 more)
Broader Connections
- Resonator pitch scales with gas speed, volume, neck geometry
#expands(0.85) - A resonant cavity can isolate a single frequency from complex sound.
#exemplifies(0.80) — Schafer, Murray R, The Soundscape- Our Sonic Environment…, 920