The response decays exponentially as determined by the loop time
and gain factor
.
Values of
nearest 1 yield the longest decay times.
To obtain a desired decay time,
may be approximated by
where
![$\displaystyle \tau$](img120.png) |
![$\displaystyle =$](img22.png) |
the loop time |
|
![$\displaystyle T60$](img121.png) |
![$\displaystyle =$](img22.png) |
the time to decay by 60dB |
|
and 0.001 is the level of the signal at 60dB down.
Figure 3:
Comb filter impulse responses with a changing the decay rate.
![\scalebox{.7}{\includegraphics{eps/simpcomb.eps}}](img122.png) |
``Music 171: Introduction to Delay and Filters''
by Tamara Smyth,
Computing Science, Simon Fraser University.
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Copyright © 2019-11-21 by Tamara Smyth.
Please email errata, comments, and suggestions to Tamara Smyth<trsmyth@ucsd.edu>