Editing Conspiracy BBS Archive/jfk-0002 (section)

== MICROPHONE LOCATION ==

One thing that made the measurements more difficult was the use of stationary microphones rather than moving ones such as the one which originally recorded the shots.  When the scientists studied the 26 echoes for each shot and computed the location of the original microphone, it resulted in an accuracy within one foot.  One set of data matched better than 95% as the position of the open mike and it was the location of motorcycle policeman [[H.B. McLain (Police Officer)|H.B. McLain]].

[[H.B. McLain (Police Officer)|McLain]] was then interviewed and estimated that he was "about 150 feet"
behind [John F. Kennedy (President)|Kennedy]].  The acoustic evidence showed the open mike was 154
behind the car when the third shot was fired.  Photographs also show [[H.B. McLain (Police Officer)|McLain]] to be in this position at the time.  The sound experts also stated that the mike was on the left side of the motorcycle and pointed toward the ground.  McLain confirmed this along with the fact that he frequently had open mike problems.  The tape also contained the sounds of the motorcycle quickly accelerating about 30 seconds after the last shot, then slowing, idling, and disappearing.  This
matches what is known to have happened following the shooting, with the recording ending as McLain flipped on his siren and thereby closed the microphone.