Tonearm mount on the plinth or on Pillar ?

It’s a little bit difficult to isolate (no pun intended) the vibration caused by airborne Acousitc Waves from the vibration caused by mechanical vibration including seismic type vibration without making some rather elaborate arrangements. But if you could I’m confident you would find that low frequency seismic vibration of the type produced by Earth crust motion, traffic, subways, etc. is by far the worst offender as regards exciting the resonance of tonearm, platter and cartridge, all of which have resonant frequencies around 10-12 Hz or thereabout, well below the lowest frequencies almost all high end audio systems are capable of producing. So, the solution for Verdier and other high mass designs is high performance (very low resonant frequency) seismic isolation. The airborne stuff, by comparison, is relatively inconsequential IMHO.

geoff kait
Machina Dynamica

The airborne stuff, by comparison, is relatively inconsequential IMHO.

Correct Geoff..

It is unimportant whether the vibration is occurring at a resonant frequency or not- its vibration either way- just more of it if its at a resonant frequency.

It really doesn’t matter much to me if people wish to create a fantasy parallel universe in which the laws of physics, evidence and data don’t exist. Audiophiles are renowned for indulging in such shenanigans.
But when some, proffer nonsense as ’fact’ without a skerick of scientific evidence and insist that we swallow it as gospel.....it begins to matter.

Halcro
Can you please explain how we can hear and clearly understand someone talking on the other side of a closed window?
Horrid music, which sounds like a broken washing machine, coming thru the walls of my sons bedroom?

Err...perhaps you should read my post again?
Or does "Transmission" not mean the same thing in New Zealand?

If air-borne sound pressure is a problem in the turntable playback system, then every increase in volume would of necessity degrade the sound.
Correct.

The defence rests....😎

It really doesn’t matter much to me if people wish to create a fantasy parallel universe in which the laws of physics, evidence and data don’t exist. Audiophiles are renowned for indulging in such shenanigans.
But when some, proffer nonsense as ’fact’ without a skerick of scientific evidence and insist that we swallow it as gospel.....it begins to matter.

Halcro, we are on the same page in this regard.

Unless, that is, if you are claiming you have a damping system so profoundly effective that ***zero*** vibration is the result- if that is the case, then you will have been successful where no-one has been before and the world will beat a path to your door.

In the meantime, I am the one with the skerick (sic) of evidence (actual measurements) whilst no-one else seems to have caused their hand to move to produce any. On top of that, I get accused of having no evidence... Ironic to say the least!

If air-borne sound pressure is a problem in the turntable playback system, then every increase in volume would of necessity degrade the sound.
Correct.

The defence rests....😎

We do agree on this point. We both recognize that air borne vibration can be a problem. I've seen exactly this affect turntables in the past, which is why I went through the lengths to create the machine I did.

I also recognized that no matter what I did, I would never be able to rid the machine of all vibration, so I made the plinth as rigid and dead as possible to prevent the cartridge from being affected by what vibration there was; allowing the mechanism to work for the goal (minimum pickup of noise other than the information in the groove) rather than against it.  The result is it is quite impervious to the volume level in the room; even at 110 db the sound is still very relaxed.

@thekong, I know that test tones are less appealing, but if you substitute a sweep generator in your test you outlined, then you can produce a chart showing at what frequencies the weaknesses lie and also display the waveform on an oscilloscope, allowing for a quantitative result. This is very much what we did in our test; only we did it with a silent groove since it was with the attempt to use an arm pod where we first noticed that there was a problem. Most audiophiles don't have access to a silent groove, and you don't really need one. Whether the platter is rotating or not really isn't important, since the noise we are looking to eliminate is not originating in the turntable to begin with.