if it wasn't for the episode where they cram all those people into the holodeck, I've seen nothing that can't be achieved with clever use of their holograms, and force field generators.<br /><br />If the holodeck can simulate sound originating from any region within it then it should also be able to completely nullify, or alter any sound within it as well using interference.<br /><br />So two people start walking apart, you get seperate holographic scenes for each, and a "treadmill" to keep them from actually going to far in any direction.<br /><br />Throw in holographs and force fields to alter their perceptions of eachother (or completely occlude the other person and just render an appropraitly scaled one) and alter sounds, and you could do a pretty good job. <div class="Discussion_UserSignature"> <p align="center"><font color="#c0c0c0"><br /></font></p><p align="center"><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">----</font></em></font><font color="#666699">SaiphMOD@gmail.com </font><font color="#999999"><em><font size="1">-------------------</font></em></font></p><p><font color="#999999"><em><font size="1">"This is my Timey Wimey Detector. Goes "bing" when there's stuff. It also fries eggs at 30 paces, wether you want it to or not actually. I've learned to stay away from hens: It's not pretty when they blow" -- </font></em></font><font size="1" color="#999999">The Tenth Doctor, "Blink"</font></p> </div>