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Something is wrong with the math-markup language - it's not rendering correctly. — Preceding unsigned comment added by RichardNeill (talk • contribs) 02:22, 17 April 2011 (UTC)
The claim about the djembe having been used 3000 years ago is pure speculation. We simply don't know how old the drum is. It is often associated with the Mali Empire (1200 AD) and the spread of the Numu (blacksmiths) across West Africa, but there is no proof of its existence prior to colonial times. It probably is at least several centuries old, but we simply don't know how old. Probably best to say "centuries" old instead. --MichiHenning (talk) 22:22, 15 April 2012 (UTC)
per Kinsler et al. the neck length needs to be corrected for the radius of the neck. For unflanged neck L' = L + 1.4a where a->neck radius. Comparing to FEA I can confirm that the corrected length is needed to get the resonant frequency to come out right. — Preceding unsigned comment added by 167.100.118.140 (talk) 15:32, 16 May 2012 (UTC)
https://en.wikipedia.org/wiki/Special:Contributions/OnBeyondZebrax is making edits that are not constructive to the Helmholtz resonance. ::OnBeyondZebrax the edit is not explaining Helmholtz resonance. 73.193.195.69 (talk) 12:44, 16 September 2015 (UTC)
I don't understand what exactly was objectionable about the edit. It seems to describe how Helmholtz resonance is relevant to construction of string instruments. Does anyone object to adding it back in? Esn (talk) 08:10, 2 January 2017 (UTC)
This quote "In some two-stroke engines, a Helmholtz resonator is used to remove the need for a reed valve. A similar effect is also used in the exhaust system of most two-stroke engines, using a reflected pressure pulse to supercharge the cylinder (see Kadenacy effect.)" looks very dubious to me. #1 if there are reed-less 2-strokes which are not using some kind of other shutter or piston to act as a reed valve, I want to know about them, I can't find anything. #2 "exhaust system ... reflected pressure pulse to supercharge the cylinder" is not Kadency effect or anything like it, it's momentum of exhaust which draws a vacuum in the cylinder pulling in air/fuel, not pressure. FYI commit which added it: https://en.wikipedia.org/w/index.php?title=Helmholtz_resonance&diff=prev&oldid=463400628 Cjdelisle (talk) 18:40, 12 April 2016 (UTC)
Hi, perhaps I missed it, but does this article explain why and how the note's pitch rises when air is blown faster into a Helmholtz resonator, until it eventually stops sounding altogether? The range can be several semitones, depending on how large the opening area is relative to the chamber volume. Is there an equation here explaining it? Esn (talk) 07:52, 2 January 2017 (UTC)
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Vitruvius (first century BC engineer) wrote of acoustics and the use of what seem to be Helmholtz resonators in theater design (Book 5, "Sounding vessels in the theater"). Does anyone have any sources on this, or on Helmholtz resonators in contemporary acoustic design? It's mentioned as a way to reduce undesirable resonances under Helmholtz resonance#Applications, but that's all. HLHJ (talk) 03:40, 2 June 2019 (UTC)