|
|
Post by nzlowie on Mar 27, 2020 20:18:08 GMT
Hi all, I have a question around acoustic foam.. I have some acoustic foam panels and some generic foam (mattress topper) the generic foam is denser than the acoustic foam and I you try and blow through it there is more restriction than the acoustic foam.
How would this be for absorbtion panels?
Thanks
|
|
|
|
Post by rock on Mar 28, 2020 0:22:32 GMT
If you want to do the least, your mattress pad may do something but probably not much. I would suggest, like I always do, 4" thick rigid fiberglass or mineral wool panels spaced 4" off the wall. Also please read the Sticky Posts at the top of the forum for all the standard information and recommendations.
|
|
|
|
Post by Hexspa on Mar 28, 2020 18:02:32 GMT
I think mattress pad is 'closed-cell' which is acoustically useless.
|
|
|
|
Post by nzlowie on Mar 30, 2020 18:39:21 GMT
Why I ask these question and not go straight for the 704 foam is I can't get it here in New Zealand.... The heaviest insulation i can get is 27kg m3 which is a fair bit lighter than whats recommended so I need to look for other available options.
|
|
|
|
Post by Hexspa on Mar 31, 2020 17:20:56 GMT
27kg/m3 isn't terrible. It's 1.5lb/ft3. Make your panels 4-8", 10-20cm, thick and you should be 99% there. Remember to use FRK on non-RFZ points for enhanced bass response. Also, experiment with gapping and angling panels about 1x the thickness.
|
|
|
|
Post by nzlowie on Mar 31, 2020 19:13:19 GMT
Thanks Hexspa, Can make them 4" no problem.
Cheers
|
|
|
|
Post by Hexspa on Apr 1, 2020 23:35:13 GMT
Cool. Just make sure to gap them 1x the thickness and use FRK on non-RFZ zones to get the maximum bass absorption. You can lean them against the wall as well - I believe that helps distribute their effective range while compensating somewhat for the 'midrange hole' that gapping creates.
|
|
