DIY TT

What Raul says is undeniably correct, but I don't think a spring suspension is a panacea that puts an absolute end to "vibrations and resonances at microscopic levels".  In fact, in some cases, or if badly implemented, such a suspension can make matters worse.

@lewm  , you always has a " but " and it's ok with me but then please your perfect solution about, we need your contribution for all we can learn.

R.

A recent new Member to my local HiFi group, has been quite impressed with the Isoacoustics Oria Footers that they have been loaned to try out in their system.

Following the experience with the Panzerholz and the AT 616 Footers the same person has sent out a link to the HiFi Group of a device they are considering buying for there TT.

It looks like it is a substantial piece of kit and hopefully if acquired it will prove quite valuable to their set up, it can be seen in the attached link.

I have set speakers up in the past on Heavy Plinths with AT 616 feet under the speakers and got very pleasant results.

I have set up similar methods for others, using their speakers and the result has been either Isoacoustic Gaia Footers are now in use or a Townsend Sub Base.

The Footer I use directly in contact with my TT Plinth is the Solid Tech 'Feet of Silence'. I have yet to have this footer improved on.

My assessments are subjective like 1000's of assessments, I don't measure such things, as I don't know how to do so accurately.

The most commonly used vibration measurement methods, which are using  accelerometers and laser devices as the methods to measure are not suitable for vibration measurement of micro vibrations. The methods referred to as Optical interferometry has the advantages of being a non-contact system and measures to a very high accuracy.

Devices to measure ambient vibration accurately and that can supply a trusted reading of a condition that can have a detrimental impact on a stylus when positioned in the LP groove are not very affordable, and are certainly not on any HiFi enthusiasts that I know equipment list.

I do believe there is a lot more available to impact on a stylus in a detrimental manner manifesting from within a Bearing Assembly, Bearing Housing Mounting Method or from the Tonearm having design flaws where bearings are as friction free as can be or internal wiring is restrictive to free wand movement. 

If the TT and Tonearm have both cncerning conditions in conjunction I don't think knowing about ambient micro vibrations and putting in control measures is going to have too much a impact on the overall situation. 

@vinylzone , I hate to tell you this old man but that is a fallacy. Just like air sound travels through the ground in waves. As a truck rolls down your street your cartridge can hear that right through the concrete. Your cartridge can also hear a lot of other stuff like your washer machine being unbalance and your refrigerator compressor starting up. It can also hear your HiFi System. Does not matter what you have the turntable on certain frequencies will make it to the cartridge by direct mechanical means or through the air. All this is distortion.

Towards the end of this demonstration there is an example of house rumble. Watch it! 

@mijostyn

In the video, the turntable is on a floor stand. Mine is not. I do not have any vibration or rumble issues in my setup, Springs isolate in both directions, and while they may help in some situations, can also prevent passing higher frequency vibration from the platter/plinth back down to any platform or subchassis that a turntable might have.

If I recall correctly, which I may not have, you experience this as feedback some time ago and had to take other measures to mitigate it.