Re: [Phys-l] harmonics

[Roger Haar <haar@physics.arizona.edu>]

Hi,

	I have been told that the situation is complicated by the flared end on 
the brass instruments.  Crudely, sound waves decouple from the flared 
about when the diameter of the horn is about a wavelength.  Higher 
frequencies decouple at a smaller diameter and thus a shorter tube which 
results in a shorter wavelength and a higher frequency.  Thus the 
"harmonic frequencies" are not exactly integer multiples of the 
fundamental.  I was told this produces the characteristic "bright" sound 
of the brass horns.

	Hopefully my source was not wrong about this.

Thanks,
 Roger Haar
U of AZ physics

*******************************************
Anthony Lapinski wrote:
> In teaching about sound, I am looking for a list of instruments and all
> the harmonics they produce. I know the harmonics determine the quality of
> sound from a musical instrument. Does anyone have or know of a good
> website/reference/table/book that shows all the instruments, which
> harmonics are present, and their relative magnitude?
>
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