this post was submitted on 28 Sep 2024
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I have seen the picture before, but it wasn't until now that I figured out the Helmholtz double entendre.
Helmholtz resonation is a way to enhance certain frequencies by blowing air into a cavity shaped to resonate with the desirable frequencies, named after German scientist Hermann von Helmholtz.
Helm means helmet in German. Holtz means wood in German (nice name: wooden helmet?) but in most other languages it resembles the word "hold" making this a helmet held Helmholtz resonator. Say it fast.
Helmholtz would actually mean 'The wood of a helmet', as 'Helm' comes first. But that makes less sense.