Woodsman said:
--Which suggests as I had more or less surmised by this point, subliminal audio and "Sound of Silence" are not perhaps as significant as the original posts made them out to be while the old system of "opening and then bombarding" people remains in force. I find it interesting LCD flat screens, with their much higher frequency CCFL light sources which effectively for the optic nerve do not strobe, were bypassed altogether by the whole "living room entertainment center" market.
EDIT*****************
I just got a brain flash. This is really interesting. Please disregard the last sentence above; I just worked out an essential element of LCD flat-screen monitors and how they might in fact strobe sometimes in a very specific way so that they strobe when playing videos but not while reading text. Let me research this a bit. I'll check in when I've thought through it fully. . .
The 'brain flash' I had was this. . .
I have suggested that the LCD flat-screen type of monitor common to many computer systems today does not contain a light source which 'strobes' in the manner which might cause a 'hypnotic openness' in the viewer because, as I am currently thinking, it strobes at such a high frequency, (in the mid to high kilohertz range), that it might indeed register as steady light. However, it struck me that
a video played on that same screen might by virtue of the inherent nature of how the illusion of motion is created via animation, might still have a hypnotic effect.
When I look at the settings for the LCD flat-screen I'm currently looking at when I write this, I see that it's refresh rate is 60 Hz. --That is, the computer sends updated video information to the screen 60 times per second. This is also referred to as the 'Frame Rate'.
Now the nice thing about an LCD monitor is that a given pixel, if it is called to remain, say, white for a whole second, (meaning that the liquid crystal 'window' which makes up the pixel is completely open, allowing light from the CCFL set behind the screen to shine through), does not mean that pixel turns on and off 60 times during that second. (As would be the case with an old CRT monitor). Rather, it persists in one state until called to change. The 60 Hz refresh rate means that the computer is simply
capable of sending new commands to that pixel 60 times per second. Which means that a page of text on a computer isn't strobing at all. Thus one can logically conclude that with no strobe effect, the screen cannot hypnotize the viewer in the manner under discussion.
However. . .
If one is watching a
video on the same screen, then the image does indeed strobe, and it may do so at the exact cycle rate as an old-style CRT monitor. (Video, depending on its type, animates at between 24 and 60 frames per second.) --Of course, this is a very different kind of strobing. I do not know exactly how one would measure for a hypnotic effect, or even if there is one, but I can can say from the soft and hard-to-quantify 'science' of simply trying to gauge my own experiences, that I have certainly noticed when I watch videos on my computer that many of the same symptoms of 'addiction' I note in myself with regular television are in evidence, although not nearly as significantly as with a regular television.
That was the content of my little brain flash. I haven't been able to verify anything hard regarding this idea yet. I spent a day wondering whether it was even worth mentioning; the simple notion that the basic concept of animation might by its very nature have a mesmerizing quality seemed rather too alarmist to contemplate seriously. But I decided that everybody here is wise enough to take all ideas with plenty of salt and to do what they will with them. In any case, it struck me as well-worth considering.
gwb1995 said:
Quote from Woodsman
The Frequency / refresh rate is the number of times a TV picture is updated each second. Most traditional TVs have a rate of 50Hz which some people may notice flickering. The latest Plasma TVs operate at 100Hz, giving a clearer picture. In addition all pixels emit light simultaneously, further reducing flicker.
I work in this arena and the data is actually incorrect. It is much worse than stated in your quote. Plasma TV's operate at a Frequency/refresh rate of 480Hz, and have done so for over four years. Now, the LCD TV's are joining the game, with sets offering refresh rates of 120Hz, and the latest, greatest ones now can refresh at 240Hz! I receive data from vendors that I can't quote here, but I am looking for data that I can post and verify to all.
This information I thought at first was a potential game changer.
--All of the information I have looked at thus far has suggested that hypnotic effects wrt strobe lights occur with frequencies in the sub 120 Hz range. --So when you described Plasma screens operating at 480 Hz, I didn't at first know what to make of it. I don't know if light flickering at that speed is fast enough to appear to the subconscious as a solid light or as a strobe, and nothing I was able to find described anybody trying to measure cognitive reactions in people exposed to light strobing in that frequency range.
HOWEVER. . .
In searching, I quickly learned that the refresh rates of plasma screen televisions is a subject of intense interest to many people; it is discussed widely in home-entertainment forums. --Apparently, the frequency of light strobing from a plasma screen is not nearly as high as 480Hz at all. Even on the newest plasma televisions, it remains at or well below the 120 Hz range where cognition is affected. Nothing appears to have changed except advertising language. Apparently what has happened is simply that modern plasma screens have been divided up into 8 or more sections or, 'subfields'. As one poster in a forum put it:
[quote author=http://www.avsforum.com/avs-vb/archive/index.php/t-1006091.html]
"8 subfields per frame x 60 frames per second = 480 subfields per second = 480hz = Marketing jargon to compete with LCD 120Hz"
[/quote]
The patent describing this system is here. . .
http://www.patentstorm.us/patents/7050035/claims.html
In any case, it is good to know that you work in the field. I am sure everybody would be grateful to learn any new tidbits of info as they come along.
Cheers, and thank-you for raising this fascinating point.