Here is a description of what I did some years ago... Massive and rigid speaker stands are much in vogue today,
precipitated by the desire to minimize relative motion of the speaker and
listener. I have largely overcome this
relative motion by mounting the speaker stands directly into the granitic
bedrock underlying the listening building.
An expanse of about two acres of solid granite was selected as the site
for the listening building and all topsoil was removed from the area. Four
mounting holes for the stands of each speaker were then drilled to a depth of
seven feet into the bedrock and stainless steel supports were press fit into
the drill holes. Glues and cements were
rejected as interfering with coupling of the stands and bedrock; instead, the
supports were cooled to cryogenic temperatures to shrink them. Expansion locked the supports in place as
they warmed to room temperature.
Speakers sit atop the supports on diamond points. I am currently contemplating the use of large
counterweights from a drawbridge to clamp the speakers securely to the
supports.
Despite the considerable attention given to speaker
movement, no provisions have heretofore been made for isolating the listener's
head. As "all motion is
relative", I elected to purchase a head and jaw clamp assembly from a
retiring brain surgeon. This is mounted
to bedrock as described above and provides a secure and stable support for the
listener's head. An ancillary benefit is
that it completely prevents any jaw motion during serious listening, thereby
eliminating changes in the shape of the ear canal documented by psychoacoustic
studies.
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"equipment stands will have direct impact on electronics then perhaps electronics will be destroyed"
not a bad summary of some of the tweeker craziness in high end audio
BUT... old-timey capacitors (the kind with metal fins) ARE known to change capacitance due to microphonics (so there can be real effects on your 1930s gear)
On the list of plausible but apparently unproven effects, I'd list tubes; after that, mechanical sub-assemblies like the laser mounting noted above for CD players (except... the error correction algorithms ought to take care of that)
Otherwise, you will have to show me some data. It will be easy to set up an experiment using a vibrometer or your laser interferometry test equipment. If you don't own the latter maybe B&W will loan you theirs, which they use to assess cone breakup.
This is really one of the last things I'd worry about (along with speaker cables, power cables, and yada yada cables).
Get good speakers, deal with the listening room, get well recorded program material and then you can substitute in extra-spendy boxes for the well-engineered electronics boxes using double-blind testing. |
theaudiotweak1,373 posts10-13-2016 3:19pmGeoff
Shear waves do not travel thru the air so they cannot be a part of your acoustic waves...
That is correct. They do propagate in any fluid, only solids. The guy arguing with you above is completely wrong. |
geoff - you are completely wrong and any undergraduate physics student could set you right or try google
Google indicates that you do car audio installation, and I hope that is working out for you |
you seem to think that a low post count implies something?
really, it implies only that people are doing other things most of the time
and I have nothing against good sound in a car, or with people doing installations
but it is obvious you don't understand bioacoustics or electronics, so your attacks on others are really ill-taken
my answer to the person above asking why you do that is that is likely a form of psychological compensation
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what makes you think brass is better than anything else?
Brass saxes are the metal of music BTW. |
dunno what you guys are smoking, but I wish I could get some of it |
no, he cannot provide any examples, and is merely a troll with no knowledge of bioacoustics, physics or engineering
long words are being fabricated in a desperate plea for attention and to get people with no knowledge to buy his crap
-- now watch how he responds... I guarantee it will not be with an article in JAES
but the brass guy cannot support this odd notions either
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oleschool - Spock wasn't trained in abnormal psychology gkaitt is trying to insert a notion invented by the notorious fakir, Rupert Sheldrake https://en.wikipedia.org/wiki/Rupert_Sheldrakeit was pseudo-scientific gibberish then, and has not improved with age |
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agear - It is not even theory, in the scientific definition of theory.
It is just woo-woo, and utterly worthless.
It IS fun to watch him try to duck and jive now though. |
why, YES, you did check in
I hate to tell you but I have a pretty sound technical education, and provide the same for others up to the PhD level and beyond.
I have also installed a few car stereos for myself only, so you may have some sort of edge there.
You have a penchant for embarrassing yourself in public. While sad, feel free to keep it up. |
another tidbit showing ignorance - a scientific hypothesis is completely different from a theory
really, at least use wikipedia before posting |
he won't respond coherently, answer or clarify or prove because he can't
he WILL likely make some comment like the above ones, indicating a middle school student is posting |
here is something that people who are not MEs can read: https://en.wikipedia.org/wiki/Resonancethere are basically 3 things you want to know about a resonance - the amplitude, its frequency (aka fundamental frequency) and the "Q" - the latter relates to how it spreads out - a sharp peak or a low broad peak |
49???
you mean it's ole' as in Spanish, not ole as in old... |
I see - ever made any speaker stands? |
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What Acts are Considered Deceptive Trade Practices in Virginia? The Virginia Consumer Protection Act lists more than 50 prohibited practices involving advertising, sales tactics, disclosures, return policies, and other aspects of commercial trade. These include, but are not limited to: - Misrepresenting that goods or services have certain quantities, characteristics, ingredients, uses, or benefits.
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Troll-kait is now revealed as not just an obnoxious 14 year old behavior problem, but as a true charlatan.
Anyone unhappy with their products should contact the Virginia Office of Consumer Affairs. |
I'd use laser interferometry or at least a vibrometer to assess the actual movement of the stands and at high volume on a variety of music and frequencies.
THEN, I'd use a driver to force the particular electronic components at those vibrations in the x,y, and z planes at greater amplitudes than found while listening to be sure.
you turn, geoff |
trollkaitt - you would not be able to understand what I do, but be assured that before giving any students a PhD, they need a lot better than 5th grade grammar
if sound quality (high fidelity) is the goal, you definitely need some measurements on audio performance (and your "thoughts" are inconsequential as they are grounded in ignorance)
and you need a lot more than a glass of water
B&W uses laser interferometry BTW and has done so for many years
but I did not expect you to understand what I was talking about; my response is for others to read |
you assume a lot of things, and it appears nearly all of them are wrong |
I think we all know who the troll is |
Sheldrake is a debunked non-scientist. Don't confuse science with 'intellectualism" -- it shows you do not understand science at all.
The same applies to the spurious notion that morphic woo-woo has to be proven wrong. One always has to show experimental evidence for something before it will get any acceptance in science. |
I think his idea is to keep talking as fast as possible so people will forget the idiocy of a few minutes ago.
PT Barnum style... |
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maybe it wasn't a turnip truck at all, but a truck hauling organic fertilizer |
I agree that a large earthquake will degrade sound quality... |
Please! The comparison to a dull undergraduate with an attention deficit is unfair to all dull undergraduates with an attention deficits.
Move it down to Jr. high schoolers with behavior problems.
The name calling remark from Mr. Troll is priceless! |
dl - I have a couple of comments on that measurements pdf:
1. The methodology is incompletely described, and there is no assessment of the accuracy, repeatability etc. of the Geophone sensor among other things.
2. Worst is likely the complete absence of sample sizes and any statistical analysis
There are several other problems with it, but there is no point in going on.
It could not be published in an engineering or scientific journal. |
is this thread now about turntables? |
the idiocy never stops, does it? |
I agree that the mods should close this thread and get rid of the troll |
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the burden of proof lies with the person (or troll) advocating a proposition
put up or shut up, trollkait |
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LIGO has little to do with Hifi - it is just a buzz word the ignorant use to try and shill those who are also ignorant
I worked for some of the original researchers trying to detect gravity waves when I was an undergrad. physics major, and believe me, they have little tolerance for BS |
we could hire an abnormal psychologist to find out |
no, poodles, you're being entrained |
do you have citations to any of the there have been thousands of experiments over the years, some written up in peer reviewed audio engineering journals??
I have access to most engineering journals and would like to look at the articles. |
