What are standing waves, how do they effect sound


What exactly are standing waves, and how do they interfere with acquiring balanced and natural sound from a speaker??
sunnyjim
Too much to type! These sites should help you: (http://www.audioholics.com/room-acoustics/listening-room-acoustics-1) (http://www.marktaw.com/recording/Acoustics/RoomModeStandingWaveCalcu.html) (http://www.sae.edu/reference_material/audio/pages/Roomodes.htm)