To: carepedeum2000 who wrote (22166 ) 3/13/2000 12:28:00 PM From: Rande Is Read Replies (1) | Respond to
Great alert, Carpe! Thanks on RMTR! As for ATCO, I just haven't the time to go into the specifics and dig into the nitty gritty of their technology. A directional speaker is certainly a possibility. . .as sound is amplified on bounces. . .we have seen what a parabolic reflector can do to capture long range sound. . .you know that guy holding the big round microphone on the sidelines of football games. . . that often gets taken out by the play. . .that is essentially a microphone pointed at a parabolic reflector for the capturing of distant sound through the amplification caused by reflection . . .the reverse in mics is a shotgun mic which rejects all sound entering from sides by putting "out-of-phase". . . so that only sound directed at the element gets picked up. . . A microphone is merely a speaker in reverse. . .they work on an identical principal. .so a speaker pointed at a parabolic reflector would act like an amphitheatre and reflect sound out in all directions. . .or a speaker set-up like a shotgun mic, where out-of-phase ambient sound is uh, I guess amplified, which would further disguise the message to any off-axis parties, while a fairly clear message could be heard by a target audience directly on-axis to the sound shotgun. . . .
