Helmholtz resonator

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Helmholtz resonator

[′helm‚hōlts ¦rez·ən‚ād·ər]
(engineering acoustics)
An enclosure having a small opening consisting of a straight tube of such dimensions that the enclosure resonates at a single frequency determined by the geometry of the resonator.
References in periodicals archive ?
The jets work by the Helmholtz resonance principle--when air is forced into a cavity the pressure increases, which forces air out and sucks it back in again, causing an oscillation--the same phenomenon that happens when blowing over a bottle.