Tonearm mount on the plinth or on Pillar ?

Accoustical excitation at frequencies other than the materials resonant frequency will result in NO vibration in the material, regardless of the energy level of this excitation?

"Acoustical excitation"....? I'm unfamiliar with that term in the scientific sense. Can you please explain its meaning?
As I stated, acoustic theory as I studied it, related to materials science and air-borne sound transmission accepts that there are only three  physical observable factors.

• Reflection
• Absorption
• Transmission

Apart from the sub-atomic level at which some say everything is vibrating.....a material cannot vibrate unless its resonant frequency/frequencies are excited. And even then it may not be noticeable or destructive unless the amplitude (volume) is sufficient.
That is why the famed 'myth' of the glass of wine/water being made to shatter when a singer hits the resonant frequency has only been scientifically observed when the volume was increased to 115dB if I recall correctly?

Now here is a serious new turntable...
http://www.analogplanet.com/content/dietrich-brakemeirs-apolyt-turntable-aims-be-worlds-finest-and-m...
Dietrich knows a thing or two about turntables, arms and cartridges.
And gosh....what are those?
They look like tonearm pods and did he say in the interview that the tops of the pods are totally isolated from the plinth and structure?
Just like the famed Continuum Caliburn turntable with its arm support divorced from the platter bearing support via suspension cables and bottom magnets.
They are obviously all mad....😱

Halcro
accoustic excitation....
firing sound at the material.
putting the material in an environment where sound is present. 

Ok again for clarity.... 

Under circumstances where we fire sound at a material.....
Are you saying that the material will ONLY vibrate at its resonance frequency, assuming that this frequency is present in the sound?
If any other sound frequency is used there will be NO vibration in the material? This with any energy level in the sound?

Under circumstances where we fire sound at a material.....
Are you saying that the material will ONLY vibrate at its resonance frequency, assuming that this frequency is present in the sound?
If any other sound frequency is used there will be NO vibration in the material? This with any energy level in the sound?

Correct....unless you define the transmission of sound through the material as caused by vibrating molecules.
During Sound Transmission Testing of walls for apartment buildings, we test at all frequencies from 20Hz to 20,000Hz at SPL up to 100dB.
The resonant frequencies of all masonry and combination plasterboard/stud/insulation fall well below the audio band and no vibrations are detected.
Glass walls of certain sizes and thicknesses can be induced to vibrate at their resonant frequencies (20-30Hz) at high SPLs.

Fixed Pillars/Armpods with a Suspended table ?

Lewm

Would you use an outboard arm pod with a suspended turntable? I don't think so.

Bdp24

True, a suspended-subchassis table will always have a plinth common to the platter bearing and arm pillar (at least as far as I know!), while a non-suspended doesn't have to, the later fact the impetus for this discussion.

I agree with both Lewm and Bdp24.   

So then, is this setup some type of Optical illusion ?


http://www.whatsbestforum.com/attachment.php?attachmentid=19961&d=1429540940


The turntable appears to be stock to me.   The Armpod has been carved to fit around the plinth. The outboard Pillar/Armpod is an accessory product made by Acoustical Systems.

Now Henry says -

Dietrich knows a thing or two about turntables, arms and cartridges.

So Henry, any idea why Dietrich has put what looks like a fixed pillar/armpod on this customers suspended turntable ?