Most people will admit to having seen optical illusions, but most will not admit to being susceptible to placebo effect. Of course, it is same kind of brain processing that is responsible for both. So, unless you are a robot, or a space alien or something, and rather you are human being with a brain made up of bundles of neurons, then of course you must have some susceptibility. It's like you are saying I would know if my brain outside of my conscious awareness ever fooled me because I would know about it inside my conscious awareness. It doesn't work that way, at least not for any human brains ever studied. Whatever is outside of conscious awareness is not directly observable by the brain owner. That's what outside of awareness means.
Let's take a quick look at MIT cables explanation... articulation poles? those are filter poles.
Why are they often made for specific equipment to interface with? The multi-pole filter is matched with the load to form a Bessel filter. Or a Deanne Jensen transformer which is designed for a Bessel filter characteristic response (low group-delay) and is why many people like the sound of them as well as measured performance. etc etc etc. You cant say this stuff to a consumer and they dont want their time wasted having you try to explain it to them in terms they do not understand any way.
But, IMO the High-End that JC attempts to explain and design to does have some good fundamental basis and seems to be a real improvement (most of the time).
Its DSP time..........
THx-RNMarsh
Why are they often made for specific equipment to interface with? The multi-pole filter is matched with the load to form a Bessel filter. Or a Deanne Jensen transformer which is designed for a Bessel filter characteristic response (low group-delay) and is why many people like the sound of them as well as measured performance. etc etc etc. You cant say this stuff to a consumer and they dont want their time wasted having you try to explain it to them in terms they do not understand any way.
But, IMO the High-End that JC attempts to explain and design to does have some good fundamental basis and seems to be a real improvement (most of the time).
Its DSP time..........
THx-RNMarsh
You can describe it in a few words as you have no doubt heard people do before. The thing is getting people to believe you and/or to develop some correct intuition about it.
Probably the best way is to give them a visualization app and let them play with it so they can see for themselves what changing various parameters does.
Other than that, reality is complex. And people are often more likely to make up explanations and believe them whether they are right or wrong, rather than going to the trouble of developing personal expertise. That is part of the trouble with being human, much to the dismay of experts in many fields.
Actually, people tend to believe things constructed in the form of stories that seem to explain cause and effect. What makes a story seem credible, at least by default, is called coherence. It is when all the pieces and parts of the story fit together like a jigsaw puzzle, no holes, no loose ends, it all makes sense so it must be true. This is how legal theories of prosecution and defense are constructed, for example, because it comports so well with how humans think.
Also related: Confidence is a feeling or sense, much like an emotion. And confidence is a function of coherence of story, not accuracy of facts. At least it is by default.
Never answer.
Glib. Elusive.
I suspect that while you may have equipment, that perhaps it is not hooked up, perhaps you don't really like to listen, or that perhaps you're not enthralled with what you have?
Why not just answer a simple and direct question regarding your own experience/expertise?
_-_-
Last edited:
No, MIT's "articulation poles" has nothing to do with Deane Jensen and having a transformer's high frequency roll off as a second order Bessel function (by the way, it was Ed Reichenbach of Reichenbach Engineering who designed the original Jensen transformers before Deane threw Ed under the bus and ran off with all of the engineering–perhaps it was the guilt over this that ultimately caused him to blow his brains out in the end).
MIT's "articulation poles" is a complete misrepresentation and misapplication of a technology developed by the telephone industry.
"Articulation" in this case refers to the intelligibility of speech over noisy phones lines. Research was carried out to find out which frequency ranges were important to the intelligibility of speech and which were not. This research allowed the design of filters that preserved the frequency ranges of importance and filter out everything else.
A perfect articulation index is 1, and even the cheapest giveaway interconnects have an articulation index of 1. So there is absolutely no need to apply any "articulation poles." Brisson is just another quack cable huckster preying on people who don't know any better.
se
ha, Bear launches into standard forum troll line #9 ' you clearly don't listen'. As the only person I am aware of on this forum that has live performances in his house I think SY listens a lot. The fact that he prefers not to give subjective fluff statements, whilst it may upset you is more accurate than trying to describe veils, soundstage changes and wife in kitchen feedback. You might not even like the same music!
Ultimately what I'm getting from that is that with a higher ratio, you can measure a smaller target from a greater distance. So in my case, let's say my target is 1/4". Just means I'll have to be within 2 inches, and with a 16:1, within 4 inches. I can easily get within 2 inches of the devices.
se
Wavebourn does as well. I was at one of his living room shows which featured an operatic bass- fantastic!
Ok, how about this.
I grab a big *** TO-3P (which probably use the same plastic for the case as the BD139), heat it up, take the case temperature with the IR thermometer, and then with the thermocouple just touching the case and use the difference to calculate actual temperature from the thermocouple reading on the BD139?
se
I grab a big *** TO-3P (which probably use the same plastic for the case as the BD139), heat it up, take the case temperature with the IR thermometer, and then with the thermocouple just touching the case and use the difference to calculate actual temperature from the thermocouple reading on the BD139?
se
You can get thick film thermocouples deposited on a plastic film carrier just like strain gauges. They have much less thermal mass.
Time. Like Scott says, you have thermal mass there with uncertain coupling. Once you've taken the reading with IR, you have the answer.
You're determined to do this the hard way.
Time. Like Scott says, you have thermal mass there with uncertain coupling. Once you've taken the reading with IR, you have the answer.
You're determined to do this the hard way.
Time I have plenty of at the moment. The BD139s are small, and much of the surface is taken up by some 6-32 pan head screws.
se
As you know MIT is nearby and I saw them do the measurements with my own eyes. I dont know his design but I know his goal. And he uses an HP network analyzer to measure his work/goal. Jensen transformers have the same goal (GD). However, you cant talk technical to a consumer you need a nice story... which often masks the actual design and can sound to you pretty crazed. Its the story or just listen and then decide to consumers and sometimes with a few numbers thrown in.
THx-RNMarsh
Last edited:
- Status
- Not open for further replies.