I agree. Improving room acoustics will be about a design and something built. (And if a bought ready made device, chosing the right design / type to avoid something which is useless for its intended purpose. -Many resistive absorbers advertised as "bass traps" are next to useless under about 250-400 Hz.)
There's a site on the internet which calculates the height of blocks of wood required to diffuse sound evenly. Anyone have a link?
This is a good site with that and many other nice tools....
mh-audio.nl - AcousticCalculator
There's a site on the internet which calculates the height of blocks of wood required to diffuse sound evenly.
Well I do remember seeing on line calculators like that and using them a few years ago. It would take some digging to find them again.
Here are some, right were I left them.
QRD Diffuser Well Depth Calculator
Schroeder diffuser calculations
mh-audio.nl - Quadratic Residue Diffusor
mh-audio.nl - Skyline Calculator - Frequency
I made QRD diffuses a few years back using these online calcs.
QRD Diffuser Well Depth Calculator
Schroeder diffuser calculations
mh-audio.nl - Quadratic Residue Diffusor
mh-audio.nl - Skyline Calculator - Frequency
I made QRD diffuses a few years back using these online calcs.
well diffuser QRD Diffuser Well Depth Calculator
the wooden block mh-audio.nl - Skyline Calculator - Frequency
Great to be here
the wooden block mh-audio.nl - Skyline Calculator - Frequency
Great to be here
The best way i found to do diy acoustic treatment is to use diffusers on the first reflection points and use basstraps in the 4 corners. Diffusers is explained already. For cheap basstraps you need to make triangles of rockwhool like explained here on a studio engineer site: DIY Corner Bass Traps: Work In Progress - Gearslutz Pro Audio Community
I used this for a few home and low budget studio's that i helped build in the past, with very good results. Better than a lot of commercial products. The only things you need is the right rockwhool, some timber (to make the frame and supports) and a cover (frabric that is closed enough to keep the dust out). It actually works as a broadband absorber, and toghetter with some diffusers on the first reflection spots, it's an effective way to tread a room acousticly on a budget with decent results. If you follow the scheme explained on the site, you're covered till +/- 30Hz.
But if you want it perfect, it's better to call an acoustician (and have a big budget).
I used this for a few home and low budget studio's that i helped build in the past, with very good results. Better than a lot of commercial products. The only things you need is the right rockwhool, some timber (to make the frame and supports) and a cover (frabric that is closed enough to keep the dust out). It actually works as a broadband absorber, and toghetter with some diffusers on the first reflection spots, it's an effective way to tread a room acousticly on a budget with decent results. If you follow the scheme explained on the site, you're covered till +/- 30Hz.
But if you want it perfect, it's better to call an acoustician (and have a big budget).
Hi, not nescessarely ( big budget and acoustician needed). I'm doubtfull of efficacity of Rockwool corners basstraps. Not that you can have good results but 30hz seems a bit optimistic as results only for Rockwool( or you used a looootttt of it). It can be effective used as 'hangers' ( wideband absorbers) but here again you'll need of very big amount. And the corner are not always where to place basstraps for optimum efficiency.
I will post a limp membrane absorber schematic for around 50hz and you'll understand why i'm doubtfull of corner rockwool being efficient at 30hz. I will post a way to check efficiency of treatment below 100hz too but it is time consuming and you'll need to perform twice ( before and after).
I will post a limp membrane absorber schematic for around 50hz and you'll understand why i'm doubtfull of corner rockwool being efficient at 30hz. I will post a way to check efficiency of treatment below 100hz too but it is time consuming and you'll need to perform twice ( before and after).
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