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Trumpet Discussion Discuss Horn Temperature and tuning in the General forums; I stumbled into the science forumn by mistake .... t...
  1. #31
    Utimate User turtlejimmy's Avatar
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    Jun 2010

    Re: Horn Temperature and tuning

    I stumbled into the science forumn by mistake ....

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  2. #32
    Utimate User gmonady's Avatar
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    Jan 2011
    Dayton, Ohio

    Re: Horn Temperature and tuning

    Quote Originally Posted by tpsiebs View Post
    The differential in size from the relative expansion/contraction of the METAL is insignificant compared to the density of the air inside the instrument as it is affected by hot/cold fluctations.
    I once again agree with this quote. As the post above notes, the mass does effect the the ability to maitain heat or cold, which has the most effect on cooling the air when the trumpet is cold. The density as also noted in another post above would therefore be impacted by this relationship. The more mass in the horn, the more cold is stored. What you say in this quote above, and in the post noting air density is a factor is RIGHT ON as to the time it takes to warm a horn, and therefore the time it takes to get the horn into tune.

    The equation on length related to the coeffecient of expansion has a factor of 10 to the -6 power, so would be essential a non-contributing "insignificant" factor. So stated in another way, it is the density of the air, impacted by the mass of the metal, rather than length or expansion of the horn that most impacts the pitch of the note.
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