Spinner strobing as a "Bird Strike Countermeasure"

In article ,
says...


Visual perception is funny and complex.

black & white films were 16 frames/second.
Color films are 24 frames/second


The frame-rate was increased from 16 to 24 at the introduction of sound (not
color). The increased linear speed was desirable to improve fidelity of the
analog optical soundtrack on the film. In either case, 24 or 16 FPS, each image
is projected three or two times (respectively) to produce an effective rate of
48 - this was done to avoid perception of flicker.



Also, the eye -- and brain -- 'notices' things that are too fleeting for
conscious identification. Google 'subliminal' advertizing -- IIRC, lab
tests showed that injected imagery with a duration of only a few milliseconds
had 'measurable' effects.



Oh NO! Not Vance Packard and the "Hidden Persuaders"!!

"Airbus" wrote in message
...
In article ,


The frame-rate was increased from 16 to 24 at the introduction of sound
(not
color). The increased linear speed was desirable to improve fidelity of
the
analog optical soundtrack on the film. In either case, 24 or 16 FPS, each
image
is projected three or two times (respectively) to produce an effective
rate of
48 - this was done to avoid perception of flicker.


Anyone know off hand what the frame rate was for home movies (8mm)?

In article twV4j.1755$QS.57@trndny03,
"Yes - I have a name" wrote:

"Airbus" wrote in message
...
In article ,


The frame-rate was increased from 16 to 24 at the introduction of sound
(not
color). The increased linear speed was desirable to improve fidelity of
the
analog optical soundtrack on the film. In either case, 24 or 16 FPS, each
image
is projected three or two times (respectively) to produce an effective
rate of
48 - this was done to avoid perception of flicker.


Anyone know off hand what the frame rate was for home movies (8mm)?

It was supposed to project at 16fps, which makes for a bit of adjustment
when converting old home movies to DVD.