Vibration, isolation and electronics...

We have veered off topic yet again, off the vibration and isolation thing. Will I tell the audio sub-industry manufacturing products to deal with these non-existent problems and all the silly people buying their products and services that they are wasting their time and money, or will someone else?

Cheers,
Frank
 
We have veered off topic yet again, off the vibration and isolation thing.

The topic comes out of the idea that the actual performance of audio electronics is so sensitive to vibration that the active studio monitor should not be a viable design. We are discussing vibration's effect upon the actual performance of audio electronics. So we're dead on topic.

Will I tell the audio sub-industry manufacturing products to deal with these non-existent problems and all the silly people buying their products and services that they are wasting their time and money, or will someone else?

If by "audio sub-industry" you mean those specialty manufacturers selling big feet, magic rocks and isolation racks for solid state components, no, I don't think you're going to tell them. If my quotes were improperly placed and you meant to say audio "sub-industry," while I would agree that their products are sub-industrial and their ideas are certainly sub-scientific, I don't think you're going to tell them either. If what you're talking about is that part of the industry that produces sub woofers, well, their amps are in their speaker cabinets. I think they already know. ;)

Tim
 
So we're dead on topic.
Sorry, my mistake. I had a vague inkling there was discussion beginning of troll behaviour and people making extravagant claims ...

the actual performance of audio electronics is so sensitive to vibration that the active studio monitor should not be a viable design
I don't think anyone is saying that. What they MAY be saying is that unless sufficient effort is made by the manufacturer to isolate vibration from circuitry that there MAY be audible effects, which MAY be incorrectly ascribed to other causes.

I did mean "audio sub-industry", as in the fact sufficient people believe that stabilising elements of an audio system in various ways does have an audible benefit, thereby encouraging producers of devices and treatments to make a some sort of living fulfilling their "needs".

Frank
 
I've been looking at this thread, just shaking my head in disbelief at some of the posts.

I spent 20 years in the defense industry, (...)

Thanks for addressing my post. You have large experience with a subject that I only know from literature and I respect it. However, there is an interesting aspect that I would like to ask you: did you publish the results of the tests you refer in peer reviewed magazines, freely available to the community?

BTW, a quick search on my department library found several papers on IEEE publications on electronic microphony in military and radar systems - but I do not have the time to go through them to find if they can be relevant to audio.
As a closing remark to my post I should remember that I am not referring to the microphony of the solid state components per se, but to the microphony of the equipment as an whole - box, pcb's, wires.
 
Sorry, my mistake. I had a vague inkling there was discussion beginning of troll behaviour and people making extravagant claims ...

People making extravagant claims are at the very heart of this issue, Frank, and though it might make me a fool, I really don't think you are a troll. I think you are the most severe example of isolated expectation bias I've ever seen, though. Usually, an illusion so strong requires group think. You seem to get there all by yourself, sometimes with almost no support. In that, you're the best I've seen.

Tim
 
Tim, I don't know whether to be offended or not! I do acknowledge high levels of expection by myself, of audio; I am frequently disappointed by what I hear, especially from my current gear: being "cheap and cheerful" it needs a lot of TLC to keep it up to scratch, but my better half has been thoroughly corrupted by my type of thinking and has no trouble pointing out when it falls back from optimum. A few other people have also been instantly indoctrinated by listening to my system, and similarly had their thinking twisted when they followed my suggestions as to how to get better sound, falsely believing it now created a more impressive audio illusion.

So in general I have been fortunate in that those around me have been good enough to accede with my madness, or perhaps have merely humoured me. Whatever the truth of the matter, at least they have allowed me to continue in my state of delusion about the meaning of good sound ...

Frank
 
Nice post.

These have been my observations as well, mechanical things vibrate (for example switches, coils, transformers, some types of capacitors, non soldered connections and loose contacts of any sort) , a transistor or ic or other non mechanical passive component mounted to a circuit board while vibrating at frequencies seen in audio will not impart that ultra low frequency change to the near speed of light activity of the charges moving through these components nor change the noise of the components in a way detectable by any human ears.(...)

Nice post also. But the debate addresses the effect of vibrations in pieces of equipment taken as an whole, not separate components. Are all capacitors, pcb's, resistors, coils and boxes "non mechanical passive components "?
 
Tim, I don't know whether to be offended or not! I do acknowledge high levels of expection by myself, of audio; I am frequently disappointed by what I hear, especially from my current gear: being "cheap and cheerful" it needs a lot of TLC to keep it up to scratch, but my better half has been thoroughly corrupted by my type of thinking and has no trouble pointing out when it falls back from optimum. A few other people have also been instantly indoctrinated by listening to my system, and similarly had their thinking twisted when they followed my suggestions as to how to get better sound, falsely believing it now created a more impressive audio illusion.

So in general I have been fortunate in that those around me have been good enough to accede with my madness, or perhaps have merely humoured me. Whatever the truth of the matter, at least they have allowed me to continue in my state of delusion about the meaning of good sound ...

Frank

I wouldn't bother to be offended, Frank. I think you've probably been around audio forums long enough to know that if you do, you'll spend a lot of time offended. You believe you accomplish the impossible with the irrational, Frank. You create imaging that is identical from 45 degrees off axis as it is from upfront, get live listening levels with no distortion, and put your ear and inch from a tweeter that still remains perfectly coherent with its mid/bass driver -- all from minor, unmeasurable tweaks to a home theater in a box. Should you take offense to being told you're suffering from expectation bias? I would think that is among the more polite things you've been told in the company of people who have a clue what audio is about.

Tim
 
I wouldn't bother to be offended, Frank. I think you've probably been around audio forums long enough to know that if you do, you'll spend a lot of time offended. You believe you accomplish the impossible with the irrational, Frank. You create imaging that is identical from 45 degrees off axis as it is from upfront, get live listening levels with no distortion, and put your ear and inch from a tweeter that still remains perfectly coherent with its mid/bass driver -- all from minor, unmeasurable tweaks to a home theater in a box. Should you take offense to being told you're suffering from expectation bias? I would think that is among the more polite things you've been told in the company of people who have a clue what audio is about.

Tim

Can't argue with that Tim
 
Having also been involved in the gov't arena, defense and not, including flight and space-qualified hardware subject to all kinds of stress testing, for several decades, and with audio forums the past two, the only thing I know for sure is that whatever I might say would be questioned, debated, and ultimately disregarded by half the participants on any given thread no matter what I might say. Sometimes that's comforting, sometimes less so... :)

BTW, most of such data is published in gov't reports, not IEEE Journals, where it is harder but not impossible to find. (Having been an IEEE member for 30+ years, I can with some confidence state it is geared more toward the academic community than industry, let alone the defense industry.) I have no interest in looking for the reports (already lived through it). Some are classified, natch...
 
I would say just turn your volume all the way up and go around tapping on all the things you can, outside or inside your system, and see if you hear it coming out of the speakers. This will at the least reveal any loose connections whether they be the end ferrule of a resistor or a bad switch or wore out rca connection or whatever. But, I think you will be banging away on a lot of things before you find a culprit, and then that can certainly be replaced as it is "defective".

Take the plunge, bang away and let us know.....I have, and none of my hafler gear did anything, atleast about 20 years ago when I was in my serious learning stage given all things audio.

Audio gear is bandlimited and so is our hearing and all that stuff.

Tom

Sorry, but I am not looking to carry tests that are not relevant - to be true I do not want to carry any tests, I am not an expert in microphony and leave them to people knowing how to carry them and analyze the results. In my view, listening to the bang test is not the proper way of checking small effects of microphony on electronics.

Just for curiosity, as I look trough these matters, I am finding that most manufacturers are really concerned about electronics microphony in their designs.
 
Well, if the gear is designed right to start with, and microphics is relevant, then why no specification to this "problem"...after all, no one is constrained to just THD and twin tone IMD but thats all they report to us...either there is a huge horrible problem (I don't think so) or this justifies 3 more thousand dollars in retail price because they used two dollars worth of dampening grommets...
It may not be a "huge" problem but it can be audible: it is at least one reason that many people can't get live level sound from their systems without distortion, as Tim mentioned above. This phenomenon is certainly accepted, but blamed on various factors like driver overload and room acoustics, and so the true causes of these problems are not addressed. I have certainly had these issues with my HT setup, but carefully, fastidiously tracked down where the root causes were and added the appropriate remedies. It wasn't rocket science, just attention to detail.

On a slight side track, I note that all the people who talk the same language as myself as regards getting good sound all have had to do major tweaking inside and outside of the gear. At the moment it is not possible to purchase a "solution" over the counter, though some companies like Spectral are starting to achieve excellent results because the people within understand the need for extreme fussiness. So unless one has the desire to play the obsessive game, or pay the money to a company with the right attitude then one's chances of getting optimum results are pretty slim ...

Frank
 
Spectral is wasting their time if they're trying to meet the needs of the audiophiles who talk your language, Frank. They could design the perfec preamp with an unlimited budget, then a cell phone would go off somewhere in the neighborhood and blow the whole mojo. It's a wonder you can get any audio satisfaction for more than a few seconds at a time.

Tim
 
I know that over the last year or whenever it was that Frank appeared on WBF, lots of people have called him out on the outrageous statements he has made. I don’t know if anyone has so clearly called out Frank as terryj has. I have to admit it was pretty funny. Here are my favorites from Terryj:

Well I agree. There are many very expensive systems that sound crap. That does NOT however mean I agree with you that a HTIAB can sound anything more than a HTIAB. And yes, I would imagine that if you changed the engine to a v8, fixed and upgraded the diff and gearbox to handle the extra power, beefed up the suspension etc etc you might be able to get a wreck to do 150mph.

but you have done none of that Frank with your HTIAB have you. You clearly stated as much in earlier threads. So your car you have been tinkering with remains a clunker, no matter how proud you are of the work.

Sorry frank. You have a home theatre in a box. It is a clunker, that vehicle will never go a hundred miles an hour. For sure, on the weekends you cut the rust out, stuff bananas in the sump to help stop the oil leaks, fixed the radiator with chewing gum and tied the exhaust up with rusty fencing wire. OK, so you put a lot of work and time into it, but it is still a rust bucket no matter how proud you are of that work, and no matter how fast you now think it is. Even if YOU think it now goes 150 MPH. Yet you tell ushow to make a system sing? By using that example of how to turn an escapee from the wrecking yard into a ferrarri?
 
I know that over the last year or whenever it was that Frank appeared on WBF, lots of people have called him out on the outrageous statements he has made. I don’t know if anyone has so clearly called out Frank as terryj has. I have to admit it was pretty funny
That's because he's from Oz, blokes here don't take prisoners when they decide to give someone a bit of a whack. Plus, I've met terry once, quite some time ago, and don't worry, he's got plenty of attitude ...

(whaddaya mean? FIIK ...)

Frank
 
And let's not forget the most outageous claim of all: that ordinary, reasonably well engineered audio equipment if sufficiently tuned and tweaked can produce excellent results. All reasonable audio people know that the only means to good sound is either buying very expensive gear, or buying from brands or individuals who have built substantial cachet in the industry ...

Frank
 
And let's not forget the most outageous claim of all: that ordinary, reasonably well engineered audio equipment if sufficiently tuned and tweaked can produce excellent results. All reasonable audio people know that the only means to good sound is either buying very expensive gear, or buying from brands or individuals who have built substantial cachet in the industry ...

Frank

Frank-we have all been around the block with you on the issue of what you have and haven't done to your HTIAB. Your answers have varied over time, but the main thing is you really have't done much. Those little speakers of yours could never put out sound at over 100dB without falling apart no matter what you say about how they "sing."
 
I know that over the last year or whenever it was that Frank appeared on WBF, lots of people have called him out on the outrageous statements he has made. I don’t know if anyone has so clearly called out Frank as terryj has. I have to admit it was pretty funny. Here are my favorites from Terryj:

Well thankyou..I think!:p I deliberately try and reign myself in on this forum, it (along with Home theatre shack-which I rarely visit anymore) is one of the more polite ones. That does NOT mean contrary views cannot be expressed, but never has it descended to that of many other forums.

A BIG plus in my book. I am not usually this polite or restrained. Well, let's just say it would not be hard to find a 'different me' on other forums at the moment!!;);)

However, can I make one small quibble with your choice of 'favs'?? Whilst those few are most certainly applicable within the context, the MOST important point (I feel) I raised was the question of whether or nor Frank would have come back and retracted his claim (which he admitted was incorrect) about cables being affected by vibrations in an audible way.

That was not addressed, even slightly.

And we 'wonder' why the audiophile BS is ever present, why the all pervading miasma get's repeated over and over.

Recently my *upset* has been over intellectual dishonesty on forums, from whatever camp. Which is why I chose to target THAT particular example of intellectual dishonesty and moral bankruptcy in this thread.

That it was left alone is telling.

That frank has taken my comments with (thankfully) good humour is just a bonus. I leave it to others to note the parts he chooses to address and those he leaves alone and so make their own conclusions.

It may not be a "huge" problem but it can be audible: it is at least one reason that many people can't get live level sound from their systems without distortion, as Tim mentioned above. This phenomenon is certainly accepted, but blamed on various factors like driver overload and room acoustics, and so the true causes of these problems are not addressed.

Again, the rhetorical technique I pointed out earlier. You start with *can be*, then subtly change it to *true causes*. How can it be a 'can be' initially, yet become a true cause subsequently?

And, by your own admission here and elsewhere, you HAVE NOT addressed anything to do with drivers and room acoustics. The well understood limitations of your drivers (for but one example) is well known to all here, except for you it seems.

On a slight side track, I note that all the people who talk the same language as myself as regards getting good sound all have had to do major tweaking inside and outside of the gear. At the moment it is not possible to purchase a "solution" over the counter, though some companies like Spectral are starting to achieve excellent results because the people within understand the need for extreme fussiness. So unless one has the desire to play the obsessive game, or pay the money to a company with the right attitude then one's chances of getting optimum results are pretty slim ...

Frank

Frank, WHAT language? A language implies that the concepts can be gotten across to others! You yourself couch things in 'maybes', 'possiblys' and could be's.

And, I'd hazard that each and every one of you who speak in half understood nebulous terms are talking about different hazy concepts.

There IS no 'language'!

That's because he's from Oz, blokes here don't take prisoners when they decide to give someone a bit of a whack. Plus, I've met terry once, quite some time ago, and don't worry, he's got plenty of attitude ...

Frank

Well yes, and I think we tend to say what we mean, none of this bullcrap 'hinting and alluding' that we ofen see. If you want to say it, SAY it. Don't hint, don't prevaricate etc.

That can at times come across differently to someone reading it in america (say).

None-the-less, you have me at a rather large disadvantage...I cannot quite place you. Are you certain you have not mistaken me for someone else??

Please clear this up, if only for the reason that I now feel rude by not remembering you! Then again, you might only need to say 'a word' and I'll go 'oh, THAT frank' or summat.
 
And let's not forget the most outageous claim of all: that ordinary, reasonably well engineered audio equipment if sufficiently tuned and tweaked can produce excellent results. All reasonable audio people know that the only means to good sound is either buying very expensive gear, or buying from brands or individuals who have built substantial cachet in the industry ...

Frank

I believe ordinary, well-engineered audio can produce excellent results, Frank. You believe your alchemy elevates sub-midfi, to defiance of logic and physics. They're very different things.

Tim
 
Your answers have varied over time, but the main thing is you really have't done much. Those little speakers of yours could never put out sound at over 100dB without falling apart no matter what you say about how they "sing."
OK, we'll keep it going, but if the "management" wants to pull the plug on this, that's fine by me ....

Mark, "little" speakers have always been able put out substantial sound: I've lost count of the number of times I've seen reviews of monster amps, where, for a bit of a laugh, they attach some little weed of a speaker to it and they are amazed by what comes out of the little fella! Drivers are pretty tough, and ones for a HT, no matter how little, are probably specified by the manufacturer to be a bit tougher, because they know people will do silly things, trying to impress friends watching a video ...

Hell, if you really want to be frightened, as another possible project, I bought an ultra cheap boombox by Sharp, brand new, and looked at the drivers: the mid/bass unit is marked on the metal as being 250watt capability. I don't think Sharp would like their supplier lying, so I reckon that beast hooked up to a decent power amp could scare a few people!

Frank
 

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