Deer can hear arrow first? Not!
08-14-2003, 10:06 AM
#21
Boone & Crockett
Join Date: Feb 2003
Location: Fredericksburg Virginia USA
Posts: 13,672
RE: Deer can hear arrow first? Not!
250 fps for the arrow so time to impact at 20 yards is .24sec
The sound of the shot gets to the deer in .062937 sec
The time that the deer has to .177063 sec
Conduction time of nerves is approx 250mph or 366 ft per sec = .00546 sec
Process time in the brain for a deer can be as short as = .001sec.
Time to travel to the muscles at 366 ft/sec = .01092 sec
Total time untill the deer reacts from the sound of the shot = .15968
So how far can a deer move in .15968 sec? (at 300fps you can - .04 sec from this)
These figures include that the deer was aware at the sound of the shot. Not relaxed. IF the deer were relaxed I would think that you could subtract another .1 of a sec for the time that the deer became aware.
(by no means are these figures 100% accurate. I just did a little math on the spreadsheet)
The sound of the shot gets to the deer in .062937 sec
The time that the deer has to .177063 sec
Conduction time of nerves is approx 250mph or 366 ft per sec = .00546 sec
Process time in the brain for a deer can be as short as = .001sec.
Time to travel to the muscles at 366 ft/sec = .01092 sec
Total time untill the deer reacts from the sound of the shot = .15968
So how far can a deer move in .15968 sec? (at 300fps you can - .04 sec from this)
These figures include that the deer was aware at the sound of the shot. Not relaxed. IF the deer were relaxed I would think that you could subtract another .1 of a sec for the time that the deer became aware.
(by no means are these figures 100% accurate. I just did a little math on the spreadsheet)
I really wonder if the length and technicalities of post here will suddenly shorten once the season comes in?[8D]
08-14-2003, 10:36 AM
#23
Join Date: Feb 2003
Location: East Yapank NY USA
Posts: 3,457
RE: Deer can hear arrow first? Not!
Process time in the brain for a deer can be as short as = .001sec.
Time to travel to the muscles at 366 ft/sec = .01092 sec
Total time untill the deer reacts from the sound of the shot = .15968
Time to travel to the muscles at 366 ft/sec = .01092 sec
Total time untill the deer reacts from the sound of the shot = .15968
I still like my doppler effect
I guess you guys have never heard of the sonic disturbance momentum theory (SDMT)???
08-14-2003, 06:26 PM
#24
Join Date: Feb 2003
Location: Illinois
Posts: 1,862
RE: Deer can hear arrow first? Not!
Rack:
I completely understood your facetious explanation of he Doppler effect.
To further explain your interpretation, which was very clear…to me:
If I was standing in the middle of the tracks as an oncoming train got closer and closer, most definitely the noise will become louder…to me. As quickly as the train struck me, the noise of the train would definitely diminish as it moved away from me, for two chief reasons; I would no longer be concerned where the train had left to, and I would be drowning out the noise of the departing train with another Doppler effect; my high-pitched, shrill, screams of agony.
Now the question that remains to be resolved is; would my screams catch up with and pass the sounds that the departing train was making?
It all makes sense and will definately help me tune my gear better.
I completely understood your facetious explanation of he Doppler effect.
To further explain your interpretation, which was very clear…to me:
If I was standing in the middle of the tracks as an oncoming train got closer and closer, most definitely the noise will become louder…to me. As quickly as the train struck me, the noise of the train would definitely diminish as it moved away from me, for two chief reasons; I would no longer be concerned where the train had left to, and I would be drowning out the noise of the departing train with another Doppler effect; my high-pitched, shrill, screams of agony.
Now the question that remains to be resolved is; would my screams catch up with and pass the sounds that the departing train was making?
It all makes sense and will definately help me tune my gear better.
08-14-2003, 09:50 PM
#26
Giant Nontypical
Join Date: Feb 2003
Location: Wisconsin/Michigan
Posts: 9,679
RE: Deer can hear arrow first? Not!
I think the buck would hear the tick-tock of your watch before the beating of your heart at 300(beats)ps!!!!!!!! You guys kill me with all this math!!!!!! I wish I had the time!!!!!!!
