Applications of math: current events

[John P]

(10-14-2017 01:12 AM)Claudio L. Wrote:  

(10-11-2017 01:35 PM)DrD Wrote:  If nothing else, we have a real story problem, with real consequences. Can the application of math reveal the path of evidence, that leads to the real facts?

https://www.youtube.com/watch?v=JxmEFeKy8aI

-Dale-

Yeah, not once he mentions the location of the recording device in his little analysis. The simple calculation from lag time to distance traveled by the bullet is only valid if the recording device was at the point where the bullet hit the pavement or very close. If the recording device was not there it's all wrong.
Imagine the recording device half way between the shooter and the point of impact. The sound of the muffler travels only half the distance, while the sound of the impact also travels half the distance (back). As an extreme, if the recording device is close to the shooter, you'd hear the sound of the muffler before the sound of the bullet hitting the pavement, so this guy's conclusion would be that a second shooter is shooting standing on the pavement, shooting down into the pavement so the bullets bounce and fly back into the barrel of the other guy's gun.
Another youtube genius was born...

I watched the video on YouTube. Yes, he did not mention where the mic was placed, but his presentation implies, sort of, that the mic was close to where the bullets were hitting the pavement. The mic must have been close to that place because many people in that are were filming the situation and recording the sounds. If the filming and the recording was done from far away the mic would not picked up the sounds of bullets hitting the pavement. Yes, it would be better if the guy on the video who presented his discovery indicated where the mic was located, but I do not think that that was a major fault on his part. He can correct it very easily. The YouTube presentation was interesting and intriguing.