re micro second delays?
Phooey. Sound travels 12/1000 inch. So if we could hear micro second delays, moving your head or a speaker that little (wait, all your diaphrams move more) will make a difference.
Phooey. Sound travels 12/1000 inch. So if we could hear micro second delays, moving your head or a speaker that little (wait, all your diaphrams move more) will make a difference.
Interesting, but hard to figure out the magnitude of the effect. They say a 20v signal, but the y-axis is label db SPL (sound pressure level) ?? they dont relate until after the speaker. These graphs dont make sense.
No, I wouldn't. That's one type, but there are a lot of drivers for bias. Especially unconscious bias.
The same as any other human. Ad hoc, anchoring, apophenia, autokinetic, availability effect, Clever Hans (especially in sales situations), clustering, coincidence, communal reinforcement, confabulation, confirmation bias, experimenter effect, hindsight, magical thinking, pareidolia, placebo, positive-outcome bias, post hoc, pragmatic, regressive, representativeness, retrospective falsification (a big one in anecdotes!), selective thinking...
If this is interesting to you, I can give you some basic stuff to read in order to understand why smart people can be easily drawn into ridiculous reasoning. An analogy I use a lot is conjurers- any good close-up magician has mastered ways of letting you fool yourself. And they LOVE having hyperintelligent "victims"- they're the easiest to fool.
Damping factor is not a useful term unless you are driving a fixed resistor. Output impedance is much more useful.
Pretty much exactly what i said when i defined EMF. SY said fixed inductor, which i assume means just that (and not in the presence of a moving magnetic field)
For every loudspeaker there is an optimal amplifier impedance and it is not necessarily as low as possible. We have a variable transconductance amplifier and you can dial in the appropriate amplifier output impedance. Very useful.
In some instances it is very useful to use a high resistance speaker cable to increase an amplifier's output impedance.
One has to always consider that the amp, speaker, and the cable connecting them are a system and you cannot discuss one without the others.
Go to firstwatt.com and see what Nelson has to say about current amplifiers, he does a good job.
dave
"Bias" goes well beyond the colloquial term.
Take a simple coin trick, the French drop. It's the classic coin-vanish and where is it? It's behind your ear! When the magician takes the coin, the observer's unconscious bias is that the coin is in the gasping hand. He saw the coin, he saw the motion, he saw the original spot where the coin was now empty. Without any conscious thought whatever, the observer comes to the exact wrong conclusion, then is astonished when the coin "vanishes." "But... I saw the magician take the coin!" No, you didn't, but that's how you remember it.
Take a simple coin trick, the French drop. It's the classic coin-vanish and where is it? It's behind your ear! When the magician takes the coin, the observer's unconscious bias is that the coin is in the gasping hand. He saw the coin, he saw the motion, he saw the original spot where the coin was now empty. Without any conscious thought whatever, the observer comes to the exact wrong conclusion, then is astonished when the coin "vanishes." "But... I saw the magician take the coin!" No, you didn't, but that's how you remember it.
Unfortunately, there's nothing in the psychology or neurology literature to support that remarkable notion.
John, one illustration. I'm not the sharpest knife in the drawer, but I'm a reasonably intelligent person. One of my former co-workers was a very skilled sleight-of-hand guy. During a demonstration of the old Three Card Molly trick, then again in a demo of Cups and Balls, I just kept getting fooled over and over despite knowing exactly how the trick was done. My co-worker kept smiling and saying, "You're smart, that's why you're so easy."
There was a wonderful inversion of this in a Penn and Teller travelogue video in Egypt. A magician does Cups and Balls for them, which they watch politely. At a point where the magician is supposed to make a move, he does so, but only as a feint. So he didn't actually do the trick, and when the ball remained exactly where it was supposed to, they nearly fell over laughing, they had been tricked so badly by someone who didn't actually do the trick.
There was a wonderful inversion of this in a Penn and Teller travelogue video in Egypt. A magician does Cups and Balls for them, which they watch politely. At a point where the magician is supposed to make a move, he does so, but only as a feint. So he didn't actually do the trick, and when the ball remained exactly where it was supposed to, they nearly fell over laughing, they had been tricked so badly by someone who didn't actually do the trick.
Changing mag field is the same as moving. And as soon as you put a changing voltage on the inductor the current thru the inductor sets up a changing mag field (this is why we have inductance) which causes back EMF. So a fixed inductor is the same as a moving voice coil if you aply an AC signal.
Your own French Coin Drop example is flawed. Obviously a person trained in the same technique has minimized any bias that would lead him to believe that a coin could vanish and reappear behind an ear.
What specific unconscious bias would prevent a person making an intelligent evaluation of his stereo system?
John
But there are a large number of variations to that trick and only by reading the performer's mind could one predict where he has placed the pea. These examples may help explain elementary theory of unconscious human bias but they have little to do with how one may evaluate his system.
John
I wouldn't use the word "intelligent." Try "factual," maybe?
In any case, any and all of them. Throw pareidolia and communal reinforcement to the head of the line.
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