Real Expert or Just Self Proclaimed

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#141
Cal Weldon said:
No not at all. Of course you don't have to divulge who you are and what your background is in order to bring forth an argument. I think that sometimes when your arguments don't gel with the mainstream, some will want to know more about you in order to have some sort of validation, that's all.

Which do you like more, the west or the east?
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If I've learned anything, its that arguments that don't gel with the mainstream are occasionally a very good thing, helping to move along a technology that still seems to have lightyears of room for improvement. I don't have a problem with Villa's attitude, but that might be because it's similar to my own style, ha!
 
#142
MJL21193 said:
I think that to conform to the Utopian ideal of this forum a new device needs to be constructed that will automatically polish off any of the abrasive tone and add a healthily layer of pleasantness to all incoming posts.

I'm working on my plastic smile right now...
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/OT on: That can have it's own problems. Here in Holland we have radio commercials from the government about how to deal with nice people 🙁
I'm not making that up.

Guy: Say, that's a nice dress!
Gal: Uhh, I already have a boy friend...
Guy: Me too!

/OT off

jd
 
#144
I've read a little of this. As for credentials Villas. uses terms with exact engineering meaning in a fairly sloppy imprecise manner. The whole resistance vs impedance comment for instance. No engineer is unfamiliar with the concept of complex impedance. To talk to Earl Geddes like he confuses the DC resistance of a speaker with its complex frequency dependant impedance is presumptuous and a little offensive.
 
#147
scott wurcer said:
To talk to Earl Geddes like he confuses the DC resistance of a speaker with its complex frequency dependant impedance is presumptuous and a little offensive.
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Thats what I thought. I may not be right about everything, but I'm not stupid!

And yes, his use of engineering terminology reflected a knowledge of the words, but his usage did not reflect a solid understanding of what they meant.
 
#148
villastrangiato said:
Over the past few months, I've been approached -actually, harassed would be a more apt description, by some folks claiming to be Transmission Line "experts" after I offered some observations regarding apparent errors in published data by a well regarded industry expert - George Augspurger. So called TL "experts" came out of the woodwork, demanding that I - and everyone else delete from our hard drives, a 1997 paper published by a university professor which can be found here:
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augspurger is on my mental ignore file. (with lipshitz, and the like ...)

Primarily, a TL is designed to suppress to the greatest possible extent the driver's total resonance (not just a narrow band as with the bass reflex) and in doing so, to achieve as close to critical damping loading as is theoretically possible.
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this is my understanding as well, for the last 30 years, or so ...


gedlee said:
The link does not seem to work for me.

The statement above is not correct so thats a bad start for your position.
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i've seen this syntax before,

went like this-

my ---- does not have ---- warts in fact thats impossible
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i did not read the link.


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what the word Expert means to me

mega stopstick/roadblock,

on the road to True Illumination -

(see the Light, further past the signal)?

(why do 'they' not want us to pass)?

An externally hosted image should be here but it was not working when we last tested it.
 
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#149
sumaudioguy said:
Yes that is really nice to see! Got any in curves for that beautiful beast?

Have had really good luck with lossy cabinet designs instead of TLs.

Also saw a TL that was pretty simple with about 1000 or so strings hanging down in the TL duct which was horizontal. No curves for that one either but it looked cool and sounded pretty good.
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That's an experiment enclosure for this.
http://www.bowers-wilkins.com/display.aspx?infid=1729
 
#151
sumaudioguy said:
In the process of building headers header volume is measure directly by filling the tube with water. Yes the length matters for other reasons like resonant tuning and so on such as an organ pipe. When it comes down to actually building the header the water volume is the final measure of the correct tube fabrication. If the volume at length is to small a larger tube is used. Mandrel bending the tube changes the cross sectional area of the tube dramatically.

So how many high performance header systems have you put out on the track? I have done about 10 first hand.

Similar errors are made in many things audio where what one believes is the prime criteria is actually not really the item of interest such as this transmission line thing. Wrote just a bit ago about the difference in transmission line concerning wire and truncated TL loudspeaker cabinet. Often it is the case we measure something that has nothing to do with what our actual test interest are and we end up making a bad conclusion from the measurement of some thing that has little to do with the effect we see. Aargh! Audio and its subversive hidden details of mysterious actions...
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Not sure what to conclude about what you're saying above. But this

http://i48.tinypic.com/jg1iyu.jpg

is what I was referring to earlier. I have been fortunate to see Ferrari and Mclaren TAG engines up close over the years as I have a friend closely connected with FISA. Have any pics to share of your headers?
 
#153
gedlee said:
...
And yes, his use of engineering terminology reflected a knowledge of the words, but his usage did not reflect a solid understanding of what they meant.
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That applies to his knowledge of header design, too. I'm sure about that, because I designed and built performance headers (and 2-stroke expansion chambers) as a sideline from 1972 to about 1980. (I never advertised, people saw my work and came to me.)

Noting Carl's point about staying on thread topic, the diversions so far have been at villastrangiato's instigation, attempting to validate his theories by alluding to expertise in fields with related physics. These have been dealt with as they occurred.

As for the thread topic, I think we're pretty much in entrenched positions, waiting for "villastrangiato" to present a design that illustrates the principles and points that he has presented. Given the apparent difficulty we have in understanding his words, a few pictures may provide the breakthrough.
 
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