(Follow up to my prior post) ...As iconoclasts of dubious ego sentiment must walk alone, lest they hear any dissenting voices. 😛
And they at least imagine they've got your shoes.
So you can't follow, you follow?
But really, I was talking about F=m/a, where the component of time sits in there like a giant elephant that dominates the room. An elephant that remains undefined, and thus disarms F=m/a from 'fact' into theory. No matter how well it may fit into engineering it never actually makes it to the fact column. So any calculation that utilizes F=m/a by definition remains not fully worked out. Maybe good enough to build by, sure, to engineer by, sure, but "reality?" Reality in combination with components, while exploring unknowns? Not a farking chance. Theory... ---and theory it remains.
And to add, mass is just another hot mess of a theory, not a fact. Engineer by it,with it, etc, sure, no problem. but mass is not reality as a fact, it's tied to that time definition thingie. Which takes you to gravitation and this gets all funky smelling. Nice tools but they remain theoretical regardless of all their functionality. I don't lose any sleep over it but I do recognize the condition the map exists in.
And they at least imagine they've got your shoes.
So you can't follow, you follow?
But really, I was talking about F=m/a, where the component of time sits in there like a giant elephant that dominates the room. An elephant that remains undefined, and thus disarms F=m/a from 'fact' into theory. No matter how well it may fit into engineering it never actually makes it to the fact column. So any calculation that utilizes F=m/a by definition remains not fully worked out. Maybe good enough to build by, sure, to engineer by, sure, but "reality?" Reality in combination with components, while exploring unknowns? Not a farking chance. Theory... ---and theory it remains.
And to add, mass is just another hot mess of a theory, not a fact. Engineer by it,with it, etc, sure, no problem. but mass is not reality as a fact, it's tied to that time definition thingie. Which takes you to gravitation and this gets all funky smelling. Nice tools but they remain theoretical regardless of all their functionality. I don't lose any sleep over it but I do recognize the condition the map exists in.
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And nonlinear in reference to what? Does the current based on the applied voltage change with frequency or level at a given frequency?
Now when the current changes with frequency that often has little effect on the loudspeaker's output because the efficiency of conversion of electrical power to acoustic energy also changes.
When the current to voltage ratio changes due to voice coil movement or other magnetic field changes etc. that usually does have an effect shown in the output of the loudspeaker.
Now for a discussion to really occur terms have to have commonality. I think once we get past voltage and current this is not happening.
Now when the current changes with frequency that often has little effect on the loudspeaker's output because the efficiency of conversion of electrical power to acoustic energy also changes.
When the current to voltage ratio changes due to voice coil movement or other magnetic field changes etc. that usually does have an effect shown in the output of the loudspeaker.
Now for a discussion to really occur terms have to have commonality. I think once we get past voltage and current this is not happening.
Not sure if it is poetry, probably more like semi-irritating facility with language, for some...
So lets go back a second to the thing I mentioned that John might have found to be useful. From the physorg website. The magnetic diode thingie.
In those moments one might analyze the whole issue with the 'facts' of those prior mentioned items: Mass, gravitation, force, etc.
And then... having to revert them to their true and actual theoretical basis ~IF~ the issue cannot be properly resolved by addressing the fundamentals as a given.
It's that line about how the longer the problem sits unsolved or unresolved, the more likely it is due to fundamental mistakes in the formulation of the question.
In our reach for the unknown in our human world, at the limits, it's all theory. No matter how much we believe in facts, there really aren't any. Use facts all you want ....but at the limits - they all go away.
So we can't solve the 'human hearing vs distortion' puzzle to everyone's satisfaction.
For decades.
Thus, where are one's formulaic assumptions in error?
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Hang in there Joe. I'm sure that you will discover more about the amp-speaker interface than your critics. Keep on Truckin' !
Please tell us Mr Curl.
Which of all Joe’s “new” and “innovative” suggestions/questions has not been already properly addressed in depth and using proper terminology ?
What is “new” and “innovative” in his posts?
George
Which of all Joe’s “new” and “innovative” suggestions/questions has not been already properly addressed in depth and using proper terminology ?
What is “new” and “innovative” in his posts?
George
Has anybody ever tried using a dual voice coil speaker, but break the amplifier feedback out directly to the second undriven coil?
edit: of course, the dc servo has to tie to the primary.
jn
edit: of course, the dc servo has to tie to the primary.
jn
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....reduced harmonic distortion by more than 6 dB. The proposed feedback and control scheme can be easily implemented using inexpensive analogue components, which can further reduce the cost and complexity of the system.
(PDF) Passive voice coil feedback control of closed-box subwoofer systems
//
(PDF) Passive voice coil feedback control of closed-box subwoofer systems
//
and later...
... Instead of relying on the coupled mechanical dynamics as reported in previous work, the proposed velocity estimation is based on the precise knowledge of electrical impedance,..
(PDF) Control of Loudspeakers Using Disturbance-Observer-Type Velocity Estimation
//
... Instead of relying on the coupled mechanical dynamics as reported in previous work, the proposed velocity estimation is based on the precise knowledge of electrical impedance,..
(PDF) Control of Loudspeakers Using Disturbance-Observer-Type Velocity Estimation
//
George, the new and innovative stuff is coming next year, maybe as soon as January! For now Joe is just warming us up, getting us ready for the revelations to come. My understanding is that he and a select group of un-named authorities, who are really experts, are about to derive Ohm's Law from first principles. (Please don't tell Joe that impedance is a vector.)
About a decade ago I came up with something that drastically lowers perception of distortion in drivers and implemented that in some specific drivers.
It works and worked gangbusters. Until the company produces speakers, it remains out of the public eye and ear.
The combination of corrective factors we have introduced is so good that a driver designer borrowed one of our pairs of loudspeakers and blew a set of drivers for the first time in his life. The usual markers that indicate distortion to the trained ear that pays attention, were absent in this pair of speakers.
The one time these two pairs of speakers went to an audio show, I think the Montreal 2009 show, the speakers were considered so good that anyone in the building who had even a passing interest in speakers, very much stopped into listen, and promptly dropped a load in their pants. Since this product is not in the market place, this post stands as apocryphal.
We never brought them to a show again, and have not much interest in beating ourselves up over the long and complicated road of manufacturing loudspeakers. That's close enough to being the real answer to stand in place of it.
Although ...with the 'trying to get people to see electromagnetics and wire a bit more clearly' with the whole liquid cable thing wreaking havoc in those engineering facts that people love to shove on others as holy and dogmatic...when that, in the end, shows itself to smell like us being stabbed to death in the streets for breaking or challenging those precious papal bulls of engineering....where 'all wire is the same' zipperheads are plotting our deaths...some violently so, seriously...
...perhaps moving back to the speakers might be the wiser way to go.
Edit: but we were afterward, a few years later... asked to become the head engineers of a company that was building extreme high end speakers. Again apocryphal, as we can't mention who. I and Taras each don't want to live in the big city, so it was a no go.
Although ...with the 'trying to get people to see electromagnetics and wire a bit more clearly' with the whole liquid cable thing wreaking havoc in those engineering facts that people love to shove on others as holy and dogmatic...when that, in the end, shows itself to smell like us being stabbed to death in the streets for breaking or challenging those precious papal bulls of engineering....where 'all wire is the same' zipperheads are plotting our deaths...some violently so, seriously...
...perhaps moving back to the speakers might be the wiser way to go.
Edit: but we were afterward, a few years later... asked to become the head engineers of a company that was building extreme high end speakers. Again apocryphal, as we can't mention who. I and Taras each don't want to live in the big city, so it was a no go.
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I am not happy with the 'feedback' word and it was used by Esa Merlainen in his book on current driving. But the mechanism I am referring is being considered serious by some serious people. I am not standing alone on this.
Also, never used the 'tricked' word and it's not about oscillations. It is more about demand of the load on the amplifier and what results from that. If that does not belong in a technical discussion, then we disagree and you can always opt out, so that is up to you.
People imagine all kinds of things when they hear it. Think of it as near instantaneous error correction instead see if that helps
near... being the key word.... 🙂
Near... my... what an innocent sounding condition....
yet so damned problematic.
I'm'a gonna get me my hands on that rotten little time barsteward and stomp his little head in....ruining my ride like that. who does he think he is, anyway?
Near... my... what an innocent sounding condition....
yet so damned problematic.
I'm'a gonna get me my hands on that rotten little time barsteward and stomp his little head in....ruining my ride like that. who does he think he is, anyway?
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