Sound editing software (Praat)

You can get Praat from here: http://www.fon.hum.uva.nl/praat/. There're also some explanations and you can certainly find more on the web. Enjoy!

Some background on phonetics

You may find interesting stuff about phonetics at the home page (http://www.ims.uni-stuttgart.de/phonetik/) of the Experimental Phonetics Group (Inst. of Natural Language Processing, University of Stuttgart, Germany).