there are three sounds recorded, one is the crack as rounds go past, then the actual gun going off, then there are echoes there are three sounds recorded, one is the crack as rounds go past, then the actual gun going off, then there are echoesThanks
Later.
Round impacts. Most people don’t know that each round has three sounds each, depending on your position.
- Muzzle sound from the gas bubble behind the round hitting the atmosphere.
- Supersonic crack if the shockwave is near you as the bullet goes by
- Impact thump/whack/bang, depending on what the bullet hits
There are also reflected waves from all of these sounds if they occur near large objects, like buildings.
The audio engineer should examine footage from recent combat in Afghanistan or Iraq.
But later when he is considering an anomaly in the recording, it looks to me like he is unable to identify echoes occuring just a tenth of a second or so after the original sound. There's a whole sequence of gun shots which appear to have such echoes.
The officer whose body cam created some of these recordings may well have "exposed" himself, not to what he thought was the direct line of gunfire, but perhaps to an indirect path for slightly delayed echoes.
No doubt there will be a lot more learned from these recordings.
Watched about a third. Very deceptive. Hand held cameras are constantly changing their position and angle of microphone to sound. His analysis would only work on a fixed position microphone that is never moved. And he knows he can slow playback speed for better analysis. Maybe he did it later, but not worth watching.
Someone please find out if the performance was being multi-track audio recorded at the time when the shooting started.
Comparing the various tracks in any multi-track audio software, and drilling down to a millisecond display of waveforems, you would be able to tell if the sound of the shot got to a microphone stage right first versus stage left microphone, and be able to tell if the microphone at the front of the stage where the singer was located got the sound later.
There is a video of some smug Mr. Know-it-all ass with bald head wearing glasses who say that the shots were coming from the venue and not the Mandalay Bay hotel. If we can see the multi-track waveforms of the concert recording, I am sure Mr. Know-it-all can be slapped down for his own good.
Back some years ago , I piped the signal from my Garrard Zero-100 turntable to Creative Sounds stereo records on my computer and I was able to tweak the side-to-side adjustment on the pickup shell to find the precise 90 degree tracking angle when I lined up the exact whack of a snare drum on both stereo tracks.
What a joy that was to listen in on perfect tracking.
here’s one to run thru a sound machine
three single shots at the beginning
https://www.youtube.com/watch?v=aVJEX1ba0ac
There’s the muzzle blast, echo from the muzzle blaster.
The crack of the bullet, the bullet is creating a sonic boom throughout it’s trajectory, and there maybe echos from that.
The further sound travels the lower the pitch, whether the sound is received directly or as an echo. The echos are lower pitch.
There is also the Doppler effect, if the recording device (phone) is being swumg in hand it will increase or decrease the pitch of the sound.
With all of these variables it will take allot more than this video to draw any conclusion.
In the video, he is not even acknowledging the Doppler effect, which stands to reason as in his world microphones aren’t meant to move and turn relative to the source.