Downloads

Our first download is a little Excel macro for calculating room modes, from John Mosser of Los Angeles. He writes:

After spending endless hours punching the wrong keys on my calculatoras I was designing my garage studio, I asked my resident spreadsheet expert(my wife) to HELP!! me... Not being one to endure the outbursts of creativelanguage which accompanied my lack of hand calculator data entry skills, mywife obliged.

An Excel 4 macro was born called modecalc.xls that automaticallycalculates axial, tangential, and oblique modes for a rectangular roomusing, (according to F. Alton Everest's "The Master Handbook of Acoustics",2nd edition pg. 90), Rayleigh's 1869 formula, which I can't show you heresince I don't know how to make a square root sign with my keyboard. (getthe book if you don't have it already - it was very helpful)

Just enter the length, width, and height in feet (20.25 = 20 feet,3 inches), for the rectangular room in question, and the frequencies of theaxial, tangential, and oblique modes will appear, as modeled after Everest'sTable 6-1, pg 92. Also, you can make bitchin' graphs of the output withinExcel.

I'm not calling this "shareware," since I don't want to infringe onanybody's rights, and the software is really a macro rather than amade-from-scratch "program." However, it saved me a ton of time, and timeis money, and money is the root of all evil, and I don't want any of youto be evil, so...

If you should feel so inclined after experiencing the wonders ofthis program (macro), I will accept donations on behalf of the MosserBetterment Fund, in increments of one million dollars - or at leaste-mail me and let me know how the program worked out for you!

John Mosser
medrecjm@crl.com