can you tell where sound comes from when you are blindfolded
In many cases, yes. This method is often employed by the blind, but can also be adopted by blindfolded people under certain conditions. Scientists are currently developing electronic systems that help amplify sound and provide synthetic vision to blind people. You can read more about it at http://www.ask.com/wiki/Acoustic_wayfinding?qsrc=3044; http://www.ask.com/wiki/Human_echolocation?qsrc=3044 and http://www.ask.com/wiki/Sensory_substitution#Auditory_vision_substitution.