This just seems like a really good question to me. If he filled the inside of the shell with silicon the drivers inside would get some shock attenuation and the silicon would also dampen the outside sound waves further. I'd really wish he did as those Starkey customs from the other thread suggest an extra 4 dB of sound isolation.
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JH Audio Customs: Why doesn't Jerry fill the inside with silicon?
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Edited by Chez - 6/4/10 at 4:00am
Earsonics does so (but with acrylic) for acoustic reasons on their top of the line customs : EM2-pro and EM3-pro. The EM1-ifi and EM2-ifi aren't filled to make upgrades to the higher models possible.
Edited by MayaTlab - 6/4/10 at 2:49pm
Not to threadcrap or anything, but silicon =/= silicone. Silicon is an element; a shiny metal they use to make the integrated circuits for computer processors. Silicone is what they use to waterproof things and seal windows. Big difference. If they filled with silicon the IEM would be very heavy and cost a fortune. The sad thing is that even IEM makers get confused sometimes. http://www.wisegeek.com/what-is-the-difference-between-silicon-and-silicone.htm
Beat me to the punch.
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