I can certainly see why you would like the effects of adding sorbothane to headphones. I have been pointing this out for some time.
https://www.head-fi.org/threads/damping-mechanical-energy-distortion-of-stax-and-other-phones-with-sorbothane-and-other-materials.744839/
If you check my later posts in that thread you will find that I report that the type of sorbothane, size and manner of fastening make a large difference. In brief, you want to use small pieces of dense (70 duro) sorb. Fastening is tricky, my best results are using a Lord commercial glue recommended by Sorbothane but which is expensive, and has a short shelf life after being opened.
The theory of sorbothane is that it gets rid of vibrational energy by converting it to heat. Probably all the vibrational energy in your phones or speakers ends up as heat in a fairly short period of time (milliseconds possibly.) The problem for audio, I suspect is that this doesn't normally happen quickly enough, so that this energy sits around in your headphone or speakers system long enough to end up back in the drivers, messing up the sound. I see many suggestions that this energy causes the walls earcups etc to vibrate making audible sound. I find this unlikely for most frequencies because wooden/plastic/metal cabinets or earcups are going to need a massive amount of energy to start behaving like speakers themselves so as I say I think the problem is the energy messing up the drivers.
The discussion in this thread quickly shifted to the use of crystals which I have never tried. But I do not understand what the physical principles are supposed to be operating here.
If you check my later posts in that thread you will find that I report that the type of sorbothane, size and manner of fastening make a large difference. In brief, you want to use small pieces of dense (70 duro) sorb. Fastening is tricky, my best results are using a Lord commercial glue recommended by Sorbothane but which is expensive, and has a short shelf life after being opened.
The theory of sorbothane is that it gets rid of vibrational energy by converting it to heat. Probably all the vibrational energy in your phones or speakers ends up as heat in a fairly short period of time (milliseconds possibly.) The problem for audio, I suspect is that this doesn't normally happen quickly enough, so that this energy sits around in your headphone or speakers system long enough to end up back in the drivers, messing up the sound. I see many suggestions that this energy causes the walls earcups etc to vibrate making audible sound. I find this unlikely for most frequencies because wooden/plastic/metal cabinets or earcups are going to need a massive amount of energy to start behaving like speakers themselves so as I say I think the problem is the energy messing up the drivers.
The discussion in this thread quickly shifted to the use of crystals which I have never tried. But I do not understand what the physical principles are supposed to be operating here.