Have to say the Townshend guy’s videos make an awful lot of sense. MC is making a lot of sense on this too. Slap your table on one of those platforms and I bet most problems go away
Right. Here's some more common sense.
Ever notice how you can hear the music even without the turntable being hooked up or anything turned on? The stylus tracking the groove causes the whole cartridge body and arm to vibrate so much you can hear it.
It's not that airborne vibrations aren't making it back into the signal. They are. It's that they are orders of magnitude lower in amplitude than the mechanical vibrations already going on. The sound you hear tracking a record are mechanical in nature. You hear the sound, but the source of the sound is mechanically tracking the groove.
Still more common sense. Airborne vibrations are super easy to deal with. You can hold a 5 gal plastic bucket over the table, this all by itself will eliminate the majority of the sound reaching the table. Add a little acoustic damping material, drop what's left 90%. People talking about a whole different room simply are not thinking things through. All you need is a good dust cover. But one that is not mechanically connected to the turntable.
I would take a large plastic tote, big enough to cover the whole turntable, line it with OC703. Cut some strips of OC703, place them on the rack. Set the cover on the strips. This will seal the table off from airborne vibration, while the strips will decouple the tote from the rack and the turntable. This will be the equivalent of an isolation room for the turntable.
Make it big enough so when you get Pods or a Podium for the turntable you can still use the acoustic cover, and you will have a really sweet isolated rig.