Ambisonic Surround Sound research has been conducted by various groups/institutions, here are a few links:-

• Richard Furse

http://www.muse.demon.co.uk/3daudio.html
• Music Technology Group, University of York, United Kingdom

http://www.york.ac.uk/inst/mustech/3d_audio/welcome.html
• Audio Research Group, University of Waterloo, Canada

http://audiolab.uwaterloo.ca/~jeffb/info/
• University of Parma, Italy

http://pcfarina.eng.unipr.it/
• Bruce Wiggins (SPARG) University of Derby
  http://sparg.derby.ac.uk/SPARG/Staff_BW.asp