Should box linings be included in volume calculations?

[Brisso57]

What is the general consensus? If the calculated box volume comes out (say) at 30 litres, should the builder build a 30 litre box and then insert lining ... OR should the box volume be fudged a bit to allow some extra, to give a NET volume of 30 litres after lining?

The question is not relevant to stuffed designs (TL's), but to boxes that are largely air.

If an allowance is to be made, is there a "rule-of-thumb"?

Thanks

Doug

 

[jnb]

Adding a fair amount of stuffing to a box increases the effective volume. Once the stuffing is compacted, the volume decreases.

I usually consider the net effect of a typical amount of stuffing to be zero change.

 

[Cal Weldon]

is there a "rule-of-thumb"?

I usually consider the net effect of a typical amount of stuffing to be zero change.

 

[Iain McNeill]

I think the question was regarding lining as opposed to stuffing, wasn't it?.
I have lined cabinets with cork & fiberboard to damp resonance and always felt that this should be accounted for in volume calculations as opposed to the fluffy stuffing which as jnb says actually increases effective volume.

Brisso57:
Can you be a bit more specific? Are you talking stuffing or lining? and what materials?

 

[Brisso57]

Brisso57:
Can you be a bit more specific? Are you talking stuffing or lining? and what materials?

How would you treat either case?

(I was really referring to lining to damp internal reflections.)

Thanx

Doug

 

[Iain McNeill]

Lining subtracts from internal volume.

Stuffing is net zero.

Really what counts is the acoustic impedance. If you can blow through it then it's stuffing.😀