In 1979 I published a model on how to compute the impulse response of
 ["Image method for efficiently simulating small-room acoustics"
   Allen, J. B. and Berkley, D. A., JASA, 65, 943-950]
In this paper is a fortan program for calculating the impulse response.
The paper is here, in djvu format (AllenBerkley97.djvu).

In the future I will collect more programs here that compute the room
impulse response according to the image model.

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room:
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This is the fortran code as published in JASA. There may have been
some minor changes, but I really dont remember. It should be very
similar if not identical to what was previously published.

The program rice.for computes the rician distribution.

Also included is a display program (pltht.for) to view
the impulse response, but this requires an old graphics package that
is very out of date, called PLOT10. I doubt anybody still has that in
working order, so I doubt the display program is worth much. Matlab
can do a much better job of graphics today anyway.

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fastfilt:
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This program is based on the IEEE book on digital signal processing
program that I wrote, to do fast convolution. It reads in the impulse
response(s) and convolves the input signal(s) with the impulse responses,
using the overlap add method.

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ErikLarsen:
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The model in the folder ErikLarsen is NOT the one I published in 1979,
but is similar.  It is based on work he did for his masters thesis
at Delft, a few years back. The program is in matlab.