Well I took a white noise source and processed that with a two pole Butterworth low pass filter set at 160 Hz. This feed an Ashly NE2400 amplifier. The output went through the device under test and into an 8 ohm 450 watt load resistor. The voltage into the resistor was around 10 VRMS by my Fluke meter.
The pictures are shown looking across the device under test. Higher voltages indicate greater loss. I did 30 runs of various devices.
Attached are some of the shots. I'll post more after lunch.
ES
The pictures are shown looking across the device under test. Higher voltages indicate greater loss. I did 30 runs of various devices.
Attached are some of the shots. I'll post more after lunch.
ES
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A misguided stereotype if I ever heard one, and does not apply to the girls I know. My girlfriend can't hang on to her and her daughter's home to save her life and won't talk to her family about it, and doesn't like to be "told" what to do. Explaining the situation to her gets her upset. She doesn't want to lose her home, but she's scared and seems totally incapable of thinking beyond the bad financial decisions she keeps making.
She's a smart woman too.
I think those of us who have been or are married have seen the emotional choices of our other halves and how often we come to understand the differences in how we make choices. I am not saying that all women think the same, I would say that is very untrue, but that there is more of a component of emotion attached to their decisions than are seen in men, though there are plenty of times men think with their eyes and not their brains. I have worked with some excellent women engineers and in other positions but I must say that the successful ones usually learn early to take on the working traits of men and leave the emotional side at home. They do in most cases where it is a technical endeavor have to work harder to get where they are going unless they are a looker and then I am not so sure that they appreciate that as much as some might think. I have worked with some ball busters and these are generally on a fast track to management and take no prisoner, but sure do not make working with them a pleasant thing.
I have a friend in a tragically similar situation. I've helped her extensively over the years, but I'm not able to now. She has a Masters in Astrophysics and is a perfectionist. Her ability to come up with reasons why nothing will work when things are suggested is incomparable. She is also a packrat.
Are you sure that's what you want to measure? The absence of "bad" electrons in the output would be what you want isn't it? You know, the ones the demon grabs in passing.
OTOH what you are presenting to the system is a signal how could it tell what to remove?
bcarso,
Is that you on the Test and Measurement board on Linkedin talking about double blind testing at JBL? I assume it is you, but wanted to ask? If it is you how in those tests are they taking into consideration the different room response of different speakers with the positioning system for the speakers in that test? Is it just that they are only looking at the on axis response and the room reflections are taken care of by the room setup? I would think that you should optimize the positioning of each speaker in a room to do a good comparison of two or more speaker setups if it is to be a good test rather than all speakers being in the exact same location? What are your thoughts on that? I have seen Toole chime in now from time to time.
Is that you on the Test and Measurement board on Linkedin talking about double blind testing at JBL? I assume it is you, but wanted to ask? If it is you how in those tests are they taking into consideration the different room response of different speakers with the positioning system for the speakers in that test? Is it just that they are only looking at the on axis response and the room reflections are taken care of by the room setup? I would think that you should optimize the positioning of each speaker in a room to do a good comparison of two or more speaker setups if it is to be a good test rather than all speakers being in the exact same location? What are your thoughts on that? I have seen Toole chime in now from time to time.
Koestler wrote a few very interesting tomes. Another is The Ghost in the Machine, which has relevance to some of the discussions going on in here.
Yes that's me. About the only Brad Wood I'm confused with sometimes is the indie record producer, who has a very large presence on Google.
Well you should dive in to the discussion! If Tim de Paravicini can do it...
Beware of LinkedIn though, as nothing is archived for the long term. Of course the optimization of placement will vary for a given room-speaker combination, but the speaker mover is a great leap forward for basic apples-to-apples comparisons, and for those who believe that aural memory is very short-term. There is also iirc more than one speaker mover, including one appropriate for near-field monitors and multimedia-oriented powered speakers, which have more representative surroundings for the application.
As I recall the main one which uses the pneumatic ram positioning is in a fairly large room where the sidewall reflections are controlled, but it's been a long time. I haven't been in there for over 8 years. There's probably some additional description in Floyd's book.
@ John: i'm sure there is, what that has to do with a casual conversation i'm not sure, we had one generalised, cliched and oddball post that you loved and saw as 'open-minded' that doesnt happen to be all that relevant or wide ranging these days. One thing is for certain, the old stereotypes do not apply, men have in some aspects become bigger bitches/gossips in the workplace as well, it really depends on the industry and how the pecking order and promotion is decided.
totally agreed on the Dykes though jacco, great people to get levelheaded feedback from, from time to time and as with gay men, often quite shrewd in the workplace.
its been a while since i've worked in such a situation though, having run my own business the last 20 years on and off, with the last 8 years solid, primarily dealing with individuals, or looking in on organisations, but when I was both chefing and in graphic design/imaging, thats how I found it. i've traditionally had a larger number of close female friends though, till the last 10 years or so when its been pretty even.
totally agreed on the Dykes though jacco, great people to get levelheaded feedback from, from time to time and as with gay men, often quite shrewd in the workplace.
its been a while since i've worked in such a situation though, having run my own business the last 20 years on and off, with the last 8 years solid, primarily dealing with individuals, or looking in on organisations, but when I was both chefing and in graphic design/imaging, thats how I found it. i've traditionally had a larger number of close female friends though, till the last 10 years or so when its been pretty even.
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It is EASY to see where KBK got his evidence about the difference between men and women's behavior. You just have to Google: 'Understanding The Differences Between Men and Women' and read the essay. Lots of supporting material too! Why do you GUYS always jump on somebody else's input? Why not just accept it as input, and go on?
If the bad electrons have to do more work at the filter then they tend not to be as active later.
Yes everything is a signal the question is do the demons know the other team's playbook?
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OK I have been asked who can scan this record to replay it. It is not longer able to track a stylus.
https://dl.dropboxusercontent.com/u/76324/Eldridge 99.jpeg
https://dl.dropboxusercontent.com/u/76324/Eldridge 99.jpeg
Yah, they pop open a brew and chill out a while.
You've shown 20 scope pics, what specifically is the reason for them...what are you demonstrating?
jn
The voltage across the device under test. Sometimes it is my Bybee, other times it is not. I am curious as to the differences folks observe. Can anyone group the images?
In the lower left corner is the image number. Of course if you mouse over the images the name may also pop up.
ES
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thanks yes thats pretty much it, the idea is to have the DAC, ADC and amplifier work with the beaglebone and the motor control to automate a repeatable series of measurements. I guess then for setting up the crossover in the room, something similar but moving the microphone may be useful. its a ways off yet, still working on the sampling and playback electronics
I believe the LEAP system optionally comes with a couple of turntables like this, but they are rather pricey, as is LEAP itself.
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