Drum Room acoustic upgrade

[Didi_n]

Hi everybody,

during the christmas holidays I want to ugrade my drum room.
It´s a basement room with walls, ceiling and floor made of conrete. The size is 14,8' x 12,5' with a height of 7,22'
Actually it sounds very bad, there are a lot of echoes and reflexions.
The room looks like this



the door is already reinforced with a rockwool filled frame on the back covered with 2 layers of gypsum panels.
There will be added a second door in the corridor in front of the actual door to reduce noise level to the outside.
The primary goal is to reduce the acoustic level inside the room, to eliminate echoes with keeping the acoustic quite linear.

Doing some research i found this link

http://www.johnlsayers.com/HR/index1.htm

Applyed to my room it woul look like this (picture shows drumriser too )



No my general question is what type of absorbers would work best for me? Simple absorber panels (Rockwool panels with a frame around), slat absorbers, panel absorbers, a combination of them?
How much surface should i cover?

I planned to buil corner absorbers for the corners, absorber panels for the walls which I would mount slightly staggered to defuse the parallel wall problem and clouds for the ceiling, which I also would hang staggered.

Please give me an idea what you think about and what I should o best.
Kind regards

Didi

[Ro]

Might wanna check: http://www.johnlsayers.com/phpBB2/viewt ... =1&t=11881
Hope that helps with your plans !

[Didi_n]

Thank you, thats´s very interesting.

I would like to know if anyone can tell me what type of panels to combine in this room to get a good sound without eliminating frequencies unequally (for example dampen high/ mid frequencies too much and low frequencies les..)
And also how much panels woud yoi suggest?Cover as much space as possible or not?

Cheers

Didi

[gullfo]

as Ro pointed out in his treatment thread - super chunk the corners for LF handling and use scatter absorption around the room including the ceiling. use 4" thick absorbers. make a bunch of 2'x2'x4" and space them out on 3'x3'. this will break up the surfaces and improve overall absorption. start out with say 30% of the walls and ceiling covered.

[Didi_n]

Hi,

thank you for the great answer, that helps me a lot.
Can I ask you why you suggest such small panels? I was planning panels around 2mt x 1,2mt x0,1mt which is around 6.5' x4' x4"
" make a bunch of 2'x2'x4" and space them out on 3'x3' "
Am I right that you mean to build that small panels and spread them out over the walls and the ceiling with gaps of 2' between the panels ( "frame" of 1' of space around every panel) where there stays the raw concrete wall without any threating? Sorry, but my english is not that perfect.

Greetz Didi

[gullfo]

the idea is to balance the overall absorption and not make it dead. when spacing the absorbers, stagger them across walls but the smaller absorbers will give you a first good start. if you decide to go with the larger ones, i'd just pay more attention to staggering them and leave a bit more space - 2' instead of 1'

[Didi_n]

Hi,

ok, thanks a lot.
Does it make a difference if I build a closed box for the super chunks in the corners? I would prefer to make them portable as maybe I´m moving in another house next year.

Greetz

Didi

[gullfo]

you want them as open as possible. in this example, i've made it 4' high and you could stack 2 in an 8' room. or adjust the height of the units to some other value like 3'6" for a 7' room etc. this way they're more portable or can be redistributed as needed.