Resonators

[chrisaiken]

Hi,
I got this from the sae site...I was just wondering about one thing.It says there that it has to be sealed airtight,where is the sealed piece for the front?Is there a board between the slats and the insulation (all I see is cloth backing)or is there a board on the back of the insulation?
Thnks...hope this makes sense.
Chris

 

[longsoughtfor]

Chris - you do not seal the front just the cavity behind the fabric. These are like a bottle... if you blow across the top, the air resonates inside, if there is a hole in the bottom of the bottle there is no pressure build up and the air won't resonate.

These traps of course don't generate a tone like a bottle of course but the air pressure created by the frequency(s) the trap is tuned to will be absorbed.

Kevin.