Re: Pitch & fundamental frequency

Subject: Re: Pitch & fundamental frequency
From: Ian Stewart (
Date: Wed Sep 07 2005 - 09:03:31 EDT

Kevin Austin writes:
> There are other 'intuitive' things in acoustics which are incorrect. The
> most blatant being that brass instruments produce the harmonic series.
> Brass instruments are pipes stopped at one end, and therefore produce the
> odd-numbered partials (.5, 1.5, 2.5, 3.5 = 1, 3, 5, 7 ...).

Perhaps I misunderstand, but brass instruments are more complex than simple
closed tubes. The piping acts much like a closed tube, but the mouthpiece
and flare shift the partials significantly, producing something
approximating a complete harmonic series (the flare raises the lower
partials, while the mouthpiece flattens the higher ones).



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