The Importance of Room Treatments

[Rolf]

I don't think they are cheap anywhere anymore. Besides that it would have been interesting to see my friends faces (probably like this ) if my walls and ceilings was covered with Lego.

I don't know about the UK but Lego's are anything but cheap in the US!

[hjames]

I don't think they are cheap anywhere anymore. Besides that it would have been interesting to see my friends faces (probably like this ) if my walls and ceilings was covered with Lego.

Lego is very precisely formed pieces - but they do use petroleum based plastic.
So its not Star Wars that drove the prices up, its the Oil wars! (Rock the casbah!)

Anyway, I don't think Legos are calculated for the right frequency dispersion ...
it just sorta-kinda looks a little bit like something, but I'm sure it really isn't anything significant, nor anything reasonable folks would want glue-gunned all over their ceiling and walls.

Just another pipe-dream ...

[Allanvh5150]

My HT is covered with Auto caprpet, red and black squares, 500mm x 500mm. It looks pretty good and it solves 98% of the problems in the room. IMO the last 2% in a home environment are not worth pursuing. Next thing after the room would be the speakers.

Allan.

[JBL 4645]

My HT is covered with Auto caprpet, red and black squares, 500mm x 500mm. It looks pretty good and it solves 98% of the problems in the room. IMO the last 2% in a home environment are not worth pursuing. Next thing after the room would be the speakers.

Allan.

Al
Auto carpet doesn’t get any cheaper LOL red and black seems nice in the right tonal light settings to set the mood.

Placement of loudspeakers is trail and error to so that it provides wide stereo listening over the seating area front row middle and back row as best as possible and listening to pans from centre to left and right to see that they image correctly in tone and other sounds higher sounds like a ping or bell sound may sound like its coming from the centre when in fact its from left it’s getting the angles sorted aiming and toeing the left and right each one ever so gently by a few degrees.

Pings and bell sounds like in Titanic (1997) should come from left as the ship goes hard to starboard some sounds or half pans also come from the centre. The way I heard it in the cinema? I was looking to left and right of the image focusing on the image and knowing there is JBL 4675/A right in that spot placed some 6 to 7 feet up from the stage floor.

Higher bleeping sounds like in Goldeneye (1995) where the bad guys walk down a corridor has high I think its 4KHz bleeping from left to right left to right as they walk towards a voice print analyze the bleeping sound then locks to centre channel and it should have prefect tonal match as it leaves right channel to centre.

HF or LCR have to be at the same height they have to be otherwise the sound will be total mess.

[svollmer]

A good forum for acoustics is here:
http://forums.musicplayer.com/ubbthr...oard/24/page/1

A good introdution on acoustics is here:
http://www.ethanwiner.com/acoustics.html

Some good diffusor articles/calculators are here:
http://www.subwoofer-builder.com/qrdude.htm

http://www.mh-audio.nl/Diffusor2.asp

http://www.digitalaudiorock.com/cgi-bin/qrd.cgi

http://www.pmerecords.com/Diffusor.cfm

There are multiple types of diffusors, bass traps, and absorbers. The most common room setup I've seen seems to be:
1. Bass traps in all four corners
2. Absorption at the point of first reflections (walls and ceiling)
3. Diffusion on the back wall behind the listener

Rives Audio seems to be doing a lot of business designing listening rooms. They've got some cool pictures of completed projects on their website: http://www.rivesaudio.com/

Of course, this isn't gospel. Every room is different and acoustics is a complicated science (at lest to a someone like me! ).

The wildest diffusors I've seen (online) are at George Massenburg's Blackbird recording studio: http://www2.digidesign.com/digizine/...=101&navid=907

[JBL 4645]

A good forum for acoustics is here:
http://forums.musicplayer.com/ubbthr...oard/24/page/1

A good introdution on acoustics is here:
http://www.ethanwiner.com/acoustics.html

Some good diffusor articles/calculators are here:
http://www.subwoofer-builder.com/qrdude.htm

http://www.mh-audio.nl/Diffusor2.asp

http://www.digitalaudiorock.com/cgi-bin/qrd.cgi

http://www.pmerecords.com/Diffusor.cfm

There are multiple types of diffusors, bass traps, and absorbers. The most common room setup I've seen seems to be:
1. Bass traps in all four corners
2. Absorption at the point of first reflections (walls and ceiling)
3. Diffusion on the back wall behind the listener

Rives Audio seems to be doing a lot of business designing listening rooms. They've got some cool pictures of completed projects on their website: http://www.rivesaudio.com/

Of course, this isn't gospel. Every room is different and acoustics is a complicated science (at lest to a someone like me! ).

The wildest diffusors I've seen (online) are at George Massenburg's Blackbird recording studio: http://www2.digidesign.com/digizine/...=101&navid=907

A complicated mathematics to suss out for each room, yes I agree.

So is there a closer picture to the walls it looks like broom handles been sawn off and stuck to the walls? If its broom handles I’ll by a cheap stock of them off ebya next month.

Was that room compute generated so the program model knows where place each stick and yes that is what it looks like with picture unless its close it for all to see clearly!


Mirror, mirror on the wall were is my refection?

I think I’m right with the mirror I read in manual. Sit in the seating location and get a friend to slide a mirror across the wall until you see the loudspeaker (is it in the corner of the eye or just visible in the mirror refection). Then place the diffuser in that location! Then move on to the next seat and the next seat, until the walls are covered.

Not sure if those are JBL in the picture the three-way passive or are they true active? The outer left and right has the mid to high mirrored while the centre mid to high is positioned centre line of the bass mid driver. Are the drivers universally switch-able allowing the user to switch the driver components around to tailor it “for the needs of the one”.

[Rolf]

As far as I know the reason to make a room "completely dead" is 1): to measure only what comes out of the speaker system itself, and 2): under recording/mixing to get the sound as "clean" as possible, with no reflections or other "disturbing" noises, giving the record to us, and let it be up to us to threat our own room to make it sound good. What is good or not good is of course another story.