- It is possible to account for attenuation due to wall losses simply by
multiplying delay line outputs by a single coefficient
.
- For a tube of length
and radius
, with observation points
at the ends of the upper and lower delay lines, the constant
has the following approximate value:
where
is the radian frequency. This approximation is valid
for tubes sufficiently short that
is near one.
- Since losses are frequency dependent however, this approximation
may not be satisfactory for all tubes (large and small).
``MUS 206: Modeling Acoustic Tubes and Wind Instrument Bores/Bells''
by Tamara Smyth,
Department of Music, University of California, San Diego (UCSD).
Download PDF version (wind.pdf)
Download compressed PostScript version (wind.ps.gz)
Download PDF `4 up' version (wind_4up.pdf)
Download compressed PostScript `4 up' version (wind_4up.ps.gz)
Copyright © 2019-05-22 by Tamara Smyth.
Please email errata, comments, and suggestions to Tamara Smyth<trsmyth@ucsd.edu>