Paul D. Schomer Michael J. White
U.S. Army Construction Eng. Res. Labs., P.O. Box 9005, Champaign, IL 61826-9005
LOOKUP provides a fast, accurate callable sub-routine to predict the one-third octave band received sound spectrum for an arbitrary combination of source height, receiver height and range, one-third-octave-band source spectrum, and surface impedance (soft or hard). SoundProp is a shell that facilitates the use of LOOKUP. With SoundProp, the user can accurately and quickly perform virtually any sound propagation prediction for a soft or hard surface and a range of sound propagation conditions. Simple barriers can also be included. Future enhancements will include separate specification of the source, path, and receiver surface impedance and additional sound-speed profiles in the LOOKUP library. SoundProp is limited to simple ASCII text file output and must have a VGA monitor. Currently, SoundProp uses about 6 MB of disk space and must be located in drive C. WINSoundProp will be a Windows version of SoundProp and will be able to plot graphical output on any printer supported by Windows. These programs, developed by the U.S. Army Construction Engineering Research Laboratories, are free.