Well, now see, that makes perfect sense if two people are exchanging
information honestly and making inquiries in good faith. But anyone who
knows that 90 decibels is the threshold noise level at which people start
manifesting involuntary startle reactions and that one third of a second
is an appropriate period of delay between the occurrence of the auditory
stimulus and the beginning of the startle reaction – that person has
obviously done more research on the subject than the average bear.
And it is simply not credible that anyone would know these two facts and
not be aware of what the same research says about how involuntary startle
reactions are typically manifested, even at decibel levels far above 90
db. As Milicent Cranor quoted British researchers in one study, "The most
generalized startle response to the standard sound stimulus employed (124
db) consisted of eye closure, grimacing, neck flexion, trunk flexion,
slight abduction of the arms, flexion of the elbows and pronation of the
forearms. There was considerable variation in the degree to which this
response was expressed, and in some subjects only eye closure and flexion
of the neck was apparent."
(
http://spot.acorn.net/jfkplace/09/fp.back_issues/31st_Issue/jiggle.html)
Bob Harris knows perfectly well why there may have been no visibly obvious
startle reactions by witnesses prior to Zapruder frame 290. Where mere
eye closure and flexing of neck muscles are all that may constitute a
typical scientifically valid startle response, those subtle responses are
not typically visible on subjects recorded on eight millimeter home movie
film at a distance of 30 to 40 feet away. This simple fact is why Dr.
Alvarez turned to analyzing the camera jitter of Abraham Zapruder, as a
more reliable indicator of when startling gunfire occurred. This, of
course, is a fact Harris not only knows, but one which he effusively
explained in detail on one of his YouTube videos.
I have reminded Harris of this specific research at least as far back as
Feb. 2 of the past year and several times since. Besides, this is not
research Harris’ critics need to defend. Bob is the one who owes us all
a cogent explanation that has yet to be forthcoming. HIS CONTENTION IS
that no unsuppressed, high-powered rifle shots were fired prior to
Zapruder frame 285 because the absence of visibly manifested startle
reactions on the Zapruder film PROVES that no audible stimulus above 90 db
occurred in that time span.
That premise is dramatically contradicted by virtually every single
witness who testified to hearing one or both of the “early shots,”
either prior to and/or simultaneous with JFK’s initial wounding in the
upper back.
These witnesses also testified that they mistook those first shots as
either fire crackers or motorcycle engine backfires. This includes the
testimony of every single person in the Presidential limo other than
President Kennedy. But don’t take my word for it. Read the Warren
Commission testimony of what each of these individuals heard and what they
immediately did in response to it. Those responses of the limo occupants
are all visible on the Zapruder film and all occurred in advance of frame
285.
The last time I checked, the only fire crackers that did not generate at
least a 90 db noise level were sparklers. I’ve never heard an internal
combustion engine backfire at less than 90 db, not even a lawn mower.
How about you?
So the obvious question is how did all these witnesses hear “early”
audible stimuli in excess of 90 db which they also inexplicably resisted
being startled by in direct violation of the laws of physics and
scientifically established behavioral response?
If you’re comfortable “chatting” with Bob as you mentioned, I’d
urge you to demand that he answer that question.
As Marsh observed previously in another thread however, I am "fed up" with
his incessant badgering and childish gamesmanship and wouldn’t trust him
if he told me water was wet.