Cheap Absorber/Diffuser

[LineArray]

Hi there,

i am posting this in the "FullRange" board,
because my loudspeakers are basically Fullrange
OB and tests have been run with those speakers.

Single absorber in front of a room corner:

http://img521.imageshack.us/my.php?image=kopievonbild045xt7.jpg

Rear side of absorber:

http://img521.imageshack.us/my.php?image=kopievonbild046rq0.jpg

Note: FR is not measured in regular listening position,
but for demonstration purposes 40 cm from the bottom.

FR without absorber:

http://img87.imageshack.us/img87/6683/ohneabsorbermessung2mo1.jpg


FR with absorber:

http://img523.imageshack.us/img523/7772/mitabsorbermessung2vz0.jpg

Costs per absorber: Approx. 12 Euros

 

[LineArray]

Some comments to measurement conditions:

The subwoofer belonging to the "Dipol 08" OB
was switched off.

A single speaker was placed in a way, that the rear
lobe of the dipole was aiming directly at the the corner.

This is a demo setting for the absorber/diffuser,
not a proper placement of the Dipol 08 OB.

Distance of OB to the corner approx 1.6 m.

Distance of microphone approx. 60cm to the front
of the baffle. Microphone approx 40cm from the bottom.
Non directive microphone.

FR measured by step response, each measurement averaged
over 10 impulses.

 

[woody]

That was a bad link! An add poped up add wanted to take my computer maby not a real virus but close to one. BAD Link do not
go there.

 

[LineArray]

woody,

i feel sorry for your problems, but i thought of
imageshack.us to be a trusted site.

Please tell us, which link caused the problem.

I cannot see any problems, when accessing the pictures
from my computer and there have been no suspect
processes started.

I use latest "resident spybot" version to track my
processes running.

Are there other members who had problems using
imageshack in the past ?

I'd like to know.

I can publish the pics somewhere else.


Maybe we should ask one of the administrators to analyse
the problem and delete the thread if necesssary.

Kind regards

 

[LineArray]

OK,

i checked the links, scanned my computer...
i cannot reproduce the problem mentioned.

Nevertheless, for security i will open a new thread
without external links to the pics.

Kind Regards

 

[r8833]

link is good..no pop ups ...what kind of materials did you use to make diffusers

 

[LineArray]

Lets use the new thread i opened for safety:


http://www.diyaudio.com/forums/showthread.php?s=&threadid=128195

But i agree, woodys problem may be home made.
But who knows ...