One would have to test it. The reverberations take some time to die out.
So you admit you have no basis for your suggestion that the sound of the second shot could reverberate for over 2 seconds. Pretty much what I thought.
The distance from the TSBD to the Post office building south of Commerce St was 200 yards so the first bounce back would take a bit more than 1 second. A second one arrives a bit more than 2 seconds afterward.
So what are you suggesting? That there was an echo of an echo? [qiote]
Are you saying that all the sound is fully absorbed after the first reflection? There are other surfaces farther south. During the acoustic experiments set up for the HSCA witnesses to see if they could distinguish distinct rifle shots or if they might be fooled by echos and reverberation. The witneses reported hearing reverberations some seconds afterward but weren't fooled by them (Report No. 4034, Analysis of Earwitness Reports Relating to the Assassination of President John F. Kennedy, D.M. Green, January 1979):
"From near the TSBD, a listener would hear a strong echo from the general vicinity of the railway overpass. However, since the initial disturbance, the shock wave from the bullet, would be almost directly overhead -- an anomalous locus, especially if the rifle had been fired from well within the TSBD - this echo would cause some confusion. The general area of the knoll, to the right of the bridge, would then be a prime candidate as the locus of the source. Even though this echo occurs 0.8 sec after the shock wave, it is the first sound that would make sense to the listener. On the other hand, listeners located near the railroad overpass would react to the very strong reflections from along Houston St.
For listeners in the Plaza area, the location of the rifle muzzle relative to the window opening is a critical determiner of the perceived sound. The further inside the building the muzzle is located, the greater the potential for the shock wave to dominate perception. If the muzzle of the rifle had been withdrawn and, therefore, little or no blast were present for one or more of the shots in 1963, the localization judgments of people in the Plaza would have been based primarily on the shock wave, creating much uncertainty and lack of agreement. [/quote]
The muzzle of the rifle was not inside the building when the shots were fired.
During the reconstruction, echoes were heard from the new hotel, but they arrived some seconds after the primary sound and long after the earlier echoes from structures bordering the Plaza. The hotel echoes, therefore, did not interfere with the subjective evaluations in any way. "
This would explain witnesses hearing multiple sounds from the third shot. What you are suggesting is entirely different.