411 REFERENCE · Wiktionary
Helmholtz resonance
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Proper noun
en physics acoustics The phenomenon of air resonance in a cavity, occurring when air is forced in and out of the cavity, causing the air inside to vibrate at a specific natural frequency.
en wind throb
See also
en helicopter ear