Stolen from a thread on SOS.
But its all good!
Room Calcs
http://www.ethanwiner.com/MODECALC.EXE
http://www.mhsoft.nl/spk_calc.asp
http://www.studiotips.com/tools/
http://www.acoustics-noise.com/RoomM...lculator.shtml
http://www.rmmpnet.org/members/ChrisW/index.html
http://www.harman.com/wp/index.jsp?articleId=131
http://forum.studiotips.com/viewtopic.php?t=684
http://www.cardas.com/cgi-bin/main_c...=Room+Setup+10
Acoustics
http://www.usg.com/Design_Solutions/...lank_sound.asp
http://www.bobgolds.com/AbsorptionCoefficients.htm
http://www.saecollege.de/reference_material/index.html
http://www.buildingscience.com/resou...on_systems.pdf.
http://www.customaudiodesigns.co.uk/articles/tloss.htm
http://www.ethanwiner.com/acoustics.html
http://irc.nrc-cnrc.gc.ca/fulltext/ir761/
http://www.du.edu/~jcalvert/waves/soundwav.htm
Bass Traps
http://ic.net/~jtgale/diy2.htm
http://www.ethanwiner.com/basstrap.html