The violin body is a Helmholtz resonator responsible for its tone.

Evidence

The principle of Helmholtz resonance takes different shapes. The body of the violin or the guitar is a good example where the air hole(s) and the body result in the lowest resonance frequency of the instrument. A bass-reflex type of loudspeaker enclosure adds a desired boost to the low-frequency response of the loudspeaker (see Section 4.1.1). The interior of a car cabin, when a window is slightly opened while driving fast, may strongly amplify turbulent noise at low or very low (infrasound) frequencies. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 160 (#corroborates, via linked claim)

The Helmholtz air resonance rescues the violin from poor low-frequency response. The lowest body mode vibration is around 450 Hz; the f-holes bolster that with an approximately 270 Hz center frequency broad Helmholtz air resonance. The G3 string vibration has a fundamental at about 196 Hz. Owing to the Helmholtz mode, the lowest frequency partials will have support. — Eric J. Heller, Why You Hear What You Hear- An…, 1796 (#expands, via linked claim)

Two acoustic resonances dominate the sound modification due to the body of instruments in the violin family at low frequencies: the resonance of the air contained within the body of the instrument or the “air resonance,” and the main resonance of the top plate or “top resonance.” Hall (2001) summarizes the important resonance features of a typical violin as follows: ■ practically no response below the first resonance at approximately 273 Hz (air resonance); ■ another prominent resonance at about 473 Hz (top resonance); ■ rather uneven response up to about 900 Hz, with a significant dip around 600 to 700 Hz; ■ better mode overlapping and more even response (with some exceptions) above 900 Hz; ■ gradual decrease in response toward high frequencies. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1116 (#corroborates, via linked claim)

Categorization

• XREF: connects to: Changing internal gas density shifts the violin’s Helmholtz resonance frequency.; Helmholtz resonance shapes violin bodies, speaker designs, and car cabin noise — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 160; Helmholtz air resonance extends violin support below its lowest body mode — Eric J. Heller, Why You Hear What You Hear- An…, 1796 (+3 more)

Related

• Violin body tone is dominated by just two low-frequency resonances (similarity 0.95)
• Helmholtz air resonance extends violin support below its lowest body mode (similarity 0.95)
• Changing internal gas density shifts the violin’s Helmholtz resonance frequency. (similarity 0.94)
• Helmholtz resonance shapes violin bodies, speaker designs, and car cabin noise (similarity 0.94)
• Air and top-plate resonances dominate violin low-frequency response (similarity 0.93)
• Blowing across a bottle mouth produces a Helmholtz resonance (similarity 0.90)
• Instrument bodies act as coupled resonators that shape and radiate sound (similarity 0.88)
• Helmholtz resonators serve as transducers, amplifiers, and sound controllers. (similarity 0.86)
• An open car window creates a living Helmholtz resonator with strong low-frequency pressure fluctuations (similarity 0.84)
• Blocking violin f-holes destroys the Helmholtz resonance and alters tone (similarity 0.84)
• Air and tap resonances align with open-string fundamentals that differ across instrument sizes (similarity 0.83)
• Stringed instruments radiate low frequencies omnidirectionally but high frequencies directionally (similarity 0.82)
• The gas filling a resonant cavity shifts its Helmholtz frequency. (similarity 0.82)
• Body-volume changes drive the Helmholtz air mode in stringed instruments (similarity 0.81)
• Phase-shifted air motion through f-holes reinforces sound radiation at high frequencies (similarity 0.80)

Broader Connections

• Helmholtz resonance shapes violin bodies, speaker designs, and car cabin noise #corroborates (0.90) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 160
• Helmholtz air resonance extends violin support below its lowest body mode #expands (0.90) — Eric J. Heller, Why You Hear What You Hear- An…, 1796
• Air and top-plate resonances dominate violin low-frequency response #corroborates (0.90) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1116
• Instrument bodies act as coupled resonators that shape and radiate sound #expands (0.80)
• Blowing across a bottle mouth produces a Helmholtz resonance #exemplifies (0.75)