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Title: Video claims shooter dressed as police
Source: [None]
URL Source: https://duckduckgo.com/?q=LAS+VEGAS ... a=videos&iax=1&iai=qMxn7hpXmk4
Published: Oct 8, 2017
Author: Planet X Investigations
Post Date: 2017-10-08 15:41:01 by A K A Stone
Keywords: None
Views: 68410
Comments: 186

Video claims shooter dressed as police


Poster Comment:

Video claims shooter dressed as police

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Begin Trace Mode for Comment # 94.

#94. To: A K A Stone, TooConservative (#0)

Regarding the video referenced by this thread: "Video claims shooter dressed as police"

This research paper - http:// www.btgresearch.org/AcousticReconstruction02042012.pdf describes, as part of their methodology, using an audio spectrogram to differentiate between impact sound and muzzle report sound.

The spectrogram capabilities of my DAW are very limited so I looked around for a free utility and, not finding anything suitable, decided to build my own utility for creating a spectrogram. 

Here's what I'm seeing in the relevant section of audio referenced in the  "Video [that] claims shooter dressed as police".

* This audio was filtered to remove as much of the crowd noise as possible.
* Lower frequency sounds (the muzzle reports) are graphed at the top - higher energy sounds towards at the bottom.
* More work to be done adding time and frequency indexes, zooming, anotating etc but it looks promising.

This is just a progress report. I will document the complete methodology as time allows.

VxH  posted on  2017-10-12   18:35:33 ET  (1 image) Reply   Untrace   Trace   Private Reply  


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