The Acoustics Evidence

[Eddy Bainbridge]

23 hours ago, Gerry Down said:

DPD officer Les Beilharz claimed in an interview that it was his microphone, not H.B. McLains, that was stuck that day.

 

https://www.maryferrell.org/showDoc.html?docId=68261#search=les beilharz

The above article is relevant to the person with a 'stuck microphone'.

The acoustic evidence is almost always mischaracterised, sometimes suspiciously so:

1. The evidence is predominantly about statistical analysis. This says that test gunshots fired from the TBSD and grassy are very accurate matches for the impulses found on the dictabelt in two respects : The acoustic waveforms match and the apparent position of a microphone recording these shots matches the movement of the motorcade.

2. An assumption (quite a big one) was made that the source of the shot sounds was the motorcycle mic of JB McLain. I have seen multiple rebuttals of this assumption and none rebutting the statistics, so it's worth reviewing the grounds of these rebuttals.

 

Firstly the assumption is that the films can accurately place McClain. They can if you believe the films are unedited versions of the event.

Secondly the rebuttals do not deal with the possibility of jumps in the Dictabelt recording. Don Thomas deals well with possibilities in that regard for those interested.

 

 So, in summary : Unchallenged stats. Weakly challenged assumption. 

 

Edited March 29, 2023 by Eddy Bainbridge

[Greg Doudna]

23 hours ago, Gerry Down said:

DPD officer Les Beilharz claimed in an interview that it was his microphone, not H.B. McLains, that was stuck that day.

 

This is interesting. An article on the MFF site, Chris Scally, “Bugliisi, Bowles, and the Open Mike” (2007), although Scally does not favor Beilharz, cites a lot of information there that does. Question: how does it affect the assessment of the HSCA acoustic analysis if it WAS Beilharz? After reading the Scally MFF site article, also another by Scally, Dealey Plaza Echo Vol 8 No. 1, March 2007, and with this tape of Beilharz, sounds to me like it’s Beilharz. But what does it mean if so?

[Pat Speer]

43 minutes ago, Eddy Bainbridge said:

https://www.maryferrell.org/showDoc.html?docId=68261#search=les beilharz

The above article is relevant to the person with a 'stuck microphone'.

The acoustic evidence is almost always mischaracterised, sometimes suspiciously so:

1. The evidence is predominantly about statistical analysis. This says that test gunshots fired from the TBSD and grassy are very accurate matches for the impulses found on the dictabelt in two respects : The acoustic waveforms match and the apparent position of a microphone recording these shots matches the movement of the motorcade.

2. An assumption (quite a big one) was made that the source of the shot sounds was the motorcycle mic of JB McLain. I have seen multiple rebuttals of this assumption and none rebutting the statistics, so it's worth reviewing the grounds of these rebuttals.

 

Firstly the assumption is that the films can accurately place McClain. They can if you believe the films are unedited versions of the event.

Secondly the rebuttals do not deal with the possibility of jumps in the Dictabelt recording. Don Thomas deals well with possibilities in that regard for those interested.

 

 So, in summary : Unchallenged stats. Weakly challenged assumption. 

 

The films are consistent and prove McLain was nowhere near where the "stats" needed him to be. 

Now, if someone wants to propose the stats work without McLain being where they theorized he was when the shots were fired, they should go for it. But they don't. Instead, they rehash Thomas' stuff and pretend it's all good. The acoustics is pretty much a CT SBT. 

[Greg Doudna]

19 minutes ago, Pat Speer said:

The films are consistent and prove McLain was nowhere near where the "stats" needed him to be. 

Now, if someone wants to propose the stats work without McLain being where they theorized he was when the shots were fired, they should go for it. But they don't. Instead, they rehash Thomas' stuff and pretend it's all good. The acoustics is pretty much a CT SBT. 

I think if one reads the two Scally articles combined with the clip posted by Gerry Down, it is clear McLain is a red herring, nothing to do with anything with the acoustics, its Beilharz. One small detail among many: McLain himself, who denied it was his motorcycle, noted a “whistling” on the tape and said that is what Beilharz did, whistled. McLain believed it was Beilharz, and Beilharz says it was Beilharz. But Beilharz was at the overpass, then Trade Mart, then Parkland, apparently did not go with the motorcade through Dealey Plaza. If it was Beilharz’s mic, would it be accurate to say that excludes the interpretation that the stuck mic recorded the shots?

Edited March 29, 2023 by Greg Doudna

[Pat Speer]

9 minutes ago, Greg Doudna said:

I think if one reads the two Scally articles combined with the clip posted by Gerry Down, it is clear McLain is a red herring, nothing to do with anything with the acoustics, its Beilharz. One small detail among many: McLain himself, who denied it was his motorcycle, noted a “whistling” on the tape and said that is what Beilharz did, whistled. McLain believed it was Beilharz, and Beilharz says it was Beilharz. But Beilharz was at the overpass, then Trade Mart, then Parkland, apparently did not go with the motorcade through Dealey Plaza. If it was Beilharz’s mic, would it be accurate to say that excludes the interpretation that the stuck mic recorded the shots?

The feeling among the acoustics proponents is that it is locked in--that they can't throw out when and where the shots were recorded without throwing out the value of the recording. I would like to see them try. It is 100% clear McLain was not where he needed to be to record the shots as proposed. Those holding onto that possibility engage in self-deception--"Well, maybe McLain slowed down his bike and cruised through the plaza at 4 mph without anyone noticing, etc." It's desperate. 

[Gerry Down]

McLain suggested the “bell” on the dictabelt was actually a lose manhole cover being driven over by Les. See 32 minutes on this video: