The resonant frequency is enhanced, giving the sound a boost around a specific frequency. When a Helmholtz resonator is made into a box and put into the exhaust flow with openings at both ends ...

There has been a great deal of research into Helmholtz resonance in general ... hand claps function like a resonator, rather than being a solid collision sound. Frequency depended upon hand ...

An OSCILLATION produced in an object which resonates at the same FREQUENCY, or a HARMONIC multiple thereof, as that present in a sound wave in contact with the object. See: EIGENTON, HELMHOLTZ ...