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mcguyver · October 25th, 2007, 22:13

Baa!! Open cell foam is much easier, and works better too.

The venting of the barrel did 95% of the job, just like the muffelr in your car does it. Takes high pressure gass to lower pressure over a larger area. The foam would have stopped any hissing sounds, but it sucks otherwise.

And I have tried it in an ICS silencer. You need to increase surface area to the expanding gas. Open cell foam does this, just like the baffles in an anechoic sound chamber, where there is zero reflected sound. Closed cells offer no increase in surface area, that's why it doesn't work and science is on my side here.

October 25th, 2007, 22:13	#22
mcguyver Trader rating Join Date: Aug 2005 Location: Northern Alberta	Baa!! Open cell foam is much easier, and works better too. The venting of the barrel did 95% of the job, just like the muffelr in your car does it. Takes high pressure gass to lower pressure over a larger area. The foam would have stopped any hissing sounds, but it sucks otherwise. And I have tried it in an ICS silencer. You need to increase surface area to the expanding gas. Open cell foam does this, just like the baffles in an anechoic sound chamber, where there is zero reflected sound. Closed cells offer no increase in surface area, that's why it doesn't work and science is on my side here. __________________ Age verifier Northern Alberta Democracy is two wolves and a sheep discussing what's for dinner. Freedom is the wolves limping away while the sheep reloads. Never confuse freedom with democracy. Last edited by mcguyver; October 25th, 2007 at 22:17..