Horn-u-copia - Theory of design of trumpets and cornets?

Horn-u-copia - Theory of design of trumpets and cornets?CanadaGender:they say discretion is the better part of valour. I on the other hand ambeyond embarassment. So I don't mind holding forth a little on anythingshort of organic chemistry or astrophysics.Back to topView Profile Email Email Personal Message50.93.86.61kentonYaBB AdministratorOnlineRe: Theory of design of trumpets andcornets?Reply #19 - Sep 4 th , 2012 at 11:59pmQuote Modify Split RemoveA quick summary of some of the measurements I did a long time ago.Posts: 5450Punxsutawney, PaGender:InstrumentBore% of horn beforevalvesFischer Trumpet .500 40 41Keefer Trumpet .500 47 45Cavalier Cornet .500 35 40Olds Cornet .500 54 41Wurlitzer Altohorn .500 9 73Lauther Civil War Vintage tenorsaxhorn.531 18 72King Sousaphone .703 17 80%conicalI quit building that table after it quickly became apparent that there wasno pattern developing.But, I bring it up at this stage because although I do believe there is somescience lurking in the construction of instruments, as clearly someinstruments do play with better intonation than others, etc., I do not findany evidence that the % of conical tubing, the position of the valves or themanner in which the tubing is bent or braced; has anything more thanincidental effect on the performance of the instrument.But then, I don't sell new instruments, so I don't have to posture as to whymy instrument plays better than the next guys.Back to topView Profile Email Email WWW141.158.211.202NinerSection LeaderOfflinePosts: 86AlabamaRe: Theory of design of trumpets andcornets?Reply #20 - Sep 5 th , 2012 at 12:07amQuote Modify Split RemoveQuote:guess what I'm really trying to say in a round about way is that thebalanced business is only there to "balance" the horn physically, tomake it easier to handle during long sessions. It has no effect on thesound of the instrument or the distribution of waves and nodesSo why is this so? There is probably a formula for total horn tube lengthrelated to tube diameter and metal density with added formula for slidegeometry and what the keys being utilized do to the path of the vibrationof that causes the sound or the feedback to the mouthpiece and the part itplays. Where the keys are and how they relate to the rest of it has tofile:///L|/Temp/Horn-u-copia%20-%20Theory%20of%20design%20of%20trumpets%20and%20cornets2%20.htm[9/7/2012 12:29:17 PM]