Can existing pa systems at airports and stadiums and other places be adapted and used to control a direct paging/tracking system to find missing passengers and also to connect other control rooms to eachother (like broadband) to improve security at airports and stadiums on ferries and cruise liners? For example can we connect computers and wireless transcievers to speaker cables and create a whole new security or paging system for airports and other places. Sleeping passengers, drunk, ill...
A: stop it you're scaring me,especially when you use those OTHER DEVICES words