How did they know that? Just because a student told them he had recorded
it? The dispatcher in Dallas said that one of the cycles had his
microphone stuck open.
They did not yet know for sure what the temperature or wind speed was at
the time of the shooting.
> They knew where the microphone was. They only had to solve for where the
> gunshots came from. Not so with the dictabelt.
>
They did not know precisely where the microphone was. Only generally
based on what the student told them.
> Try this. Here's an equation:
>
> A * B + C = D
>
> Now I tell you that A = 5, B = 6, D = 100. Solve for C.
>
> No problem, C = 70.
>
You flunked algebra in grade school, didn't you?
Why should we believe you are telling the truth about A and B?
> Now I tell you that A = 8, that's all. Solve for C.
>
> You can't. The principals of math are the same. Nobody is raising a
> question about the validity of mathematics, or of acoustics. There are just
> too many unknowns to answer the question.
>
BBN were the best acoustical scientists in the country, recommended to
the HSCA by the Acoustical Society of America. They realize the
uncertainties and designed a test to reduce them.
>>> I know that Barger himself thought the critics may well have had a valid
>>> point, regarding the impossibility of that recording having been made
>>> during the assassination. He could not and would not defend his earlier
>>> findings.
>>>
>>>
>>
>> No, he didn't. You're just making that up. You can't quote him saying
>> that. He did defend his work.
>>
>
> He has done very little to defend his work. He hasn't conceded. that's
> about all you can say.
>
I can say more than that. I can say that he stands by his original work
and you are trying to misrepresent him to push a political agenda.
> He could have done more if he chose. Unlike the rest of us, he's had the
You could have done more. Barger wrote a letter outlining what
additional studies the DOJ could do to resolve the issue. And of course
the DOJ ignore it. And you ignored it. Again, who was the only person on
this planet to write a computer program to recreate the W&A method for
the other shots? Was that you? I didn't think so.
> data to work with. Yes, the HSCA was gone and nobody was paying him to do
> it, but nobody paid me either. I'd say he didn't have much interest in
> clarifying the results for some reason.
>
The DOJ couldn't pay for it, because they were spending all their money
defending the government spies who were accused of torturing babies.
>>>> and nothing about the acoustical evidence.
>>>
>>> I know the most important thing about it: it isn't evidence at all.
>>>
>>
>> It certainly is evidence. Just like fingerprints.
>>
>
> Not just like fingerprints.
>
Mr. Weiss: �The principles we used are basically the fundamental
principles in acoustics, namely that sound moves out in all directions,
it is reflected, and the speed of the sound is constant in whatever
direction it may go, so that the farther you are from the source of the
sound, the longer it will take for that sound to reach you, whether or
not it is the original sound or the reflecting echo.�
�In a situation such as an echo generated in Dealey Plaza, you have
reflecting surfaces in the walls of buildings, fences, etc., so if you
have a very short, sharp sound, such as a rifle firing, you would hear
something like � bang, bang, bang, and diminishing in amplitude as you
get echoes over a larger period. If the buildings are the same 15 years
later, as they are in Dealey Plaza, and a rifle is shot form exactly the
same spot, you would have exactly the same sequence of echoes.�
�These acoustical principles have been established a very long time,
they have been known for several hundred years. These are fundamental
things in acoustics, the things taught in high school or undergraduate
level college physics.�
�Bascially we used a large survey map of Dealey Plaza, on a scale of one
inch corresponding to ten feet, a ruler that could be extended, a hand
calculator for computing some very simple things, and an oscilloscope
for observing the wave shapes of the sounds that we get when we played
back the tape recordings, and a device that enabled us to plot these
patterns on paper to examine them in very fine detail.�
�The basic idea is that if a sound heard on the police tape was the
sound of gunfire, then I ought to be able to find a position for that
microphone and a position for that gun such that I could predict a
pattern of echoes that would match the sounds to a high degree of
accuracy. The graph made by the sound of the shot, and the echoes that
were received by the microphone on Dealey Plaza can be likened to
fingerprints. The pattern of sounds is unique and that pattern is as
much a fingerprint that identifies two things � the location of the
sound � the rifle, and the location of the receiver � the microphone.�
�Although they were smudged by noise, we sought to match the
fingerprints we had that had been recorded in 1963. We did that match in
a numerical way that allowed us to score each match. I could then say
that the match of a predicted pattern with the observed pattern is so
close that the probability that the sound is something other than a
gunshot becomes very small.�
Upload your credentials and we'll compare them to Weiss.
Are you a member of the Acoustical Society of America?
>>>
>>>> BBN found 15 significant matches. They expected about half of those
>>>> would be false alarms due to the inherent looseness of the tests. But
>>>> many of the matches were merely the same shot recorded by nearby
>>>> microphones, not separate shots. So they could group the 15 matches
>>>> into 5 specific times on the tape. They threw out one set because it
>>>> was too soon after a better match. That is how they narrowed it down
>>>> to 4 shots. If any had an agenda to find a specific number of shots it
>>>> was Gary Mack who said he could HEAR 6 shots on the tape. BBN did not
>>>> design the tests to find a specific number of shots. If it was just
>>>> random noise then they could have found 10 or more shots at many
>>>> places on the tape. But they found 4 within the known time range of
>>>> the shooting in Dealey Plaza. Coincidence? Yeah about 1 time out of a
>>>> million.
>>>>
>>>
>>> Of course there was an ostensible rationale for their cherry-picking. Of
>>> course they could explain it to themselves. That's always the case.
>>>
>>
>> There was no cherry picking. You don't understand science. They EXPECTED
>> that about half the matches would be false positives.
>>
>
> No. We've been over this too. Show me the *prior expectation* that half
> the matches would be false.
>
Show what? The numbers or the matches? I am only reminding you of what
Dr. Barger said he expected from the test.
Dr. BARGER - Therefore, it would not be unreasonable to expect that
approximately 5 of the remaining 10 correlations were also false alarms.
That would indicate that about one-half of the detections that I did not
previously indicate to be false alarms, about one-half the remaining 10,
are false alarms. This would indicate that the probability that each one
is a correct detection is about one-half.
That was a judgment, and so I said it is close enough to be 50-50 that I
will judge that the false alarm rate in this experiment is 50 percent.
Now, my question. Why are you even here discussing this topic if you
were not even aware of Dr. Barger's testimony?
> Michael
>
>
>>> /sm
>>
>>
>
>
>