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Quiz about adding dense mass to a vibration isolation application!

There are two steps in this quiz:

1) Hypothetically, you have a DAC that is very solidly built on all sides and weighs 25 lbs.

This DAC currently has three Nobsound vibration isolation devices under it, the springs of which are about 50% compacted and are damped by foam ear plugs inserted inside of them.  The vibration isolation effect with this setup is merely middling according to a cell phone seismograph app.

2) You add a 25 lb granite slab to the top of the DAC with a 1/8-inch rubber mat between it and the DAC, and then add the appropriate number of ear plug foam damped springs to each Nobsound device in order to get all Nobsound device springs back to about 50% compacted.

The question: What do you think is the sonic result of step 2?

128x128gladmo

Showing 1 response by perkri

perkri
891 posts
 

Love these threads! 

To couple or decouple, that is the question.

That and mass loading :)

I keep coming back to the same answer. Whatever unwanted vibrations that exist in the component, they need to go away. So, couple the component to something of a significant enough mass and of an appropriate material that will absorb those unwanted vibrations. Then decouple all of that so no external vibrations make their way back into the component.

But, is that even right, and how to do that effectively?


 

 

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