Beyond the Ariel

[ScottG]

Originally posted by Baseballbat


Edit: Goddammit, does this forum censor strong language? Since when?

LOL..

From inception. There are some that get to ******* prickish about it.

[Robh3606]

"I mean real beer. You know: American beer is like making love in a canoe... F*ing close to water."

You are not drinking the right American beer. We say that about Coors Light.

Oh and CSD's can be useful.

Rob

[xpert]

Originally posted by Lynn Olson
Shadow Vector links for non-Google users:

Hi,

Thank You very much. I invented a self regulating clock based on statistics in nuclear experiments used at CERN for a short time. After that my underrated first job was the forecast of citizens traffic behavior by arificial intelligence. First I had to analyize the complexity of the problem as being NP squared. Like the bees wouldn't fly if they knew physics humans won't get up from bed if they knew how complex their daily decissions are - at least economically. So I learnt a lot on heuristics. And - errors. And - how errors propagate and prolongate itself.

Originally posted by Baseballbat
Hi,

... most of us are simple structured, No-PhD human beings, and most of us don't understand group delay. Do you ever tried to teach a non-technician about group delay and he understands the case within one hour? ...

** I mean real beer. You know: American beer is like making love in a canoe... F*ing close to water.

Drinking to much beer makes You even simpler. This may be right for U (this morning ;-): With Group Delay we have clear tresholds at hand to decide if a certain GD will be critical to the listener or not. We know that human hearing is quite forgiving on that.

If You see some graph with ripples well below 0.5ms of GD You would have the strong confidence that it wouldn't matter. The same seen as CSD would make people nervous. They imidiatetely would start to interprete the zound of that - wrong. AYERS ROCK does not sound!

The task is to make DIYers forget about CSD, not to teach them it's impossible perception. BTW: hasn't been Fincham at K.E.F. been the inventor of the CSD perspective on group delay an amplitude response?

so long

[Baseballbat]

Hi,

Originally posted by xpert
If You see some graph with ripples well below 0.5ms of GD You would have the strong confidence that it wouldn't matter.

that's absolutely right. But again, try to explain a non-technician what group delay is. He won't get it. Show him a CSD (or better a burst decay) additionally and he will most probably understand (in particular case).

This is why I still think they are useful.

Bye

Baseballbat

P.S.: need some aspirin...

[mige0]

Originally posted by gedlee

...
I would like to appologize for bringing up my designs in the context of a "subjective" discussion. This is quite unlike me ....

You don't necessarily have to put yourself down, Earl

– looking at the bright side –
I'd say you have developed confidence in your *subjective* power of judgment and found the courage to express *without* asking for proof of the scientific world (or even the scientist in you)


Michael

[soongsc]

Originally posted by xpert


...With Group Delay we have clear tresholds at hand to decide if a certain GD will be critical to the listener or not. We know that human hearing is quite forgiving on that.

If You see some graph with ripples well below 0.5ms of GD You would have the strong confidence that it wouldn't matter. The same seen as CSD would make people nervous. They imidiatetely would start to interprete the zound of that - wrong. AYERS ROCK does not sound!

The task is to make DIYers forget about CSD, not to teach them it's impossible perception. BTW: hasn't been Fincham at K.E.F. been the inventor of the CSD perspective on group delay an amplitude response?

so long

Goup delay is based on phase shift vs frequency expressed in relation with the input. CSD expresses spectrum variation over time "after" the input is removed. These two relate to different aspects of the system response.

[mige0]

Originally posted by ScottG



...in an effort to minimize the "less than stellar" CSD you provided - which wasn't a big deal....

Just for the record – its been me who provided “post processing” CSD's – Earl did the IR measurement of his OS wave guide.

What you mean by “less than stellar CSD” if I may ask?
I mean – decay looks great for me – as long as we would not like to go into hairsplitting (sub msec terretory) – no?
Any signs you could identify for reflections at the mouth / throat etc?

Michael

[Baseballbat]

Hi,

Originally posted by soongsc
CSD expresses spectrum variation over time "after" the input is removed.

removing a signal is like applying a signal.

And GD is highly related to the way the spectrum "variates". Imagine a lowpass filter with a very high Q. Where is the maximum GD? And where is the main resonance, which becomes dominant over time?

Bye

Baseballbat

[soongsc]

Originally posted by Baseballbat
Hi,



removing a signal is like applying a signal.

And GD is highly related to the way the spectrum "variates". Imagine a lowpass filter with a very high Q. Where is the maximum GD? And where is the main resonance, which becomes dominant over time?

Bye

Baseballbat

When your input is already 0, and you still have output. The meaning is not the same as having continous input and having an input/output relationship.

[Baseballbat]

Hi,

Originally posted by soongsc
When your input is already 0, and you still have output.

the input changes, from maybe a single sine to zero, and this change is also an input, and the system reacts to it. The reaction is dependant of the complex frequency response, so on the group delay.

Bye


Baseballbatboy