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Arksun · 10th December 2009

The more I read on this topic the more I realise the importance of gas flow resistance.

My question is, if both specific acoustic performance data is lacking, and there's nothing on gas flow resistance in the technical specs either, are there any other pointers to the suitability of a material for bass trapping?, or is one left completely in the dark.

There's some hemp/cotton insulation I've been looking at, 50/50 mix. It's density is 35 Kg/m3, but there's no frequency specific acoustic data, nor can I find gas flow resistance information.

I am guessing it would be fine at 4" thick, but for anything greater I'm concerned about it having a high resistance, dont really want it starting to reflect at say 8" thick.

10th December 2009	#1
Arksun Lives for gear Joined: Oct 2006 Location: Cotswolds, UK Posts: 1,123 Thread Starter 1 Review written	Bass trap material suitability The more I read on this topic the more I realise the importance of gas flow resistance. My question is, if both specific acoustic performance data is lacking, and there's nothing on gas flow resistance in the technical specs either, are there any other pointers to the suitability of a material for bass trapping?, or is one left completely in the dark. There's some hemp/cotton insulation I've been looking at, 50/50 mix. It's density is 35 Kg/m3, but there's no frequency specific acoustic data, nor can I find gas flow resistance information. I am guessing it would be fine at 4" thick, but for anything greater I'm concerned about it having a high resistance, dont really want it starting to reflect at say 8" thick.