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...
PT Barnum style...
Do equipment stands have an impact on electronics?
Mechanical grounding or isolation from vibration has been a hot topic as of late. Many know from experience that footers, stands and other vibration technologies impact things that vibrate a lot like speakers, subs or even listening rooms (my recent experience with an "Energy room"). The question is does it have merit when it comes to electronics and if so why? Are there plausible explanations for their effect on electronics or suggested measurement paradigms to document such an effect?
Showing 44 responses by randy-11
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. |
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 |
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 |
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_Sheldrake it was pseudo-scientific gibberish then, and has not improved with age |
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. |
here is something that people who are not MEs can read: https://en.wikipedia.org/wiki/Resonance there 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 |
who makes this? http://www.machinadynamica.com/machina41.htm here are some fans: http://www.machinadynamica.com/machina41.htm |
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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 |
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 |
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. |
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. |