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RE: Room treatment advice/SPL meter

99.88.166.165

In Reply to: RE: Room treatment advice/SPL meter posted by bob24 on February 12, 2020 at 09:15:55

I played with the technology, I'm an EE so why wouldn't I!
My suggestion is that you treat the obvious basics and blow off the measurements.
Your room response without treatment will have a scraggly freq vs. amplitude graph. Your treated room will have a different scraggly freq vs. amplitude graph. If you took your system into an anechoic chamber, it would probably measure super flat in freq vs. amplitude but sound bizarre.
The pink noise suggestion is probably worthwhile just to experience the difference, although music A/Bs will be just as good. The perceived difference will be substantial and increase incrementally depending upon how far you go.
My suggested priority:
1. Bass absorbers in room corners behind speakers
2. Absorbers at first reflection points on side walls
3. Center absorber behind listening position
4. Bass absorbers in corners behind listening position
5. Absorbers at first reflection points on ceiling
6. Room ceiling 3 axis corner absorbers (front first, behind listening position second)
Adapt according to your room configuration. Diffusers may work at reflection points but I have not tried diffusers. Seems like diffusers would not be very effective with bass energy but, again, I have not tried them. Absorbers are dramatic with bass.
Well worth the effort!
Mike

Edits: 02/14/20

Follow Ups:

If Bob24 is up to DIY, then see this post - Jon Risch 22:23:26 02/29/20 (1)
Without getting all bogged down with measurements and perhaps too specific with the treatments, you can achieve some pretty decent results with a basic overall approach, as outlined in the various acoustic treatment notes I have put out over the years. Some of the URL's may be out of date, but a Google search for
Jon Risch DIY wall panels
or
Jon Risch DIY bass traps
will usually find you some pages with one persons version of how they implemented my basic designs.

The original DIY Acoustic Treatment Note:
http://www.audioasylum.com/audio/tweaks/messages/17/174817.html

The above includes a section on bass traps, these are rather involved for a simple DIY approach, so I include some info at the bottom here for the Quick & Dirty bass traps, the easiest to make and cover.

Pics and diagrams of Wall Panel:

http://gallery.audioasylum.com/cgi/view.mpl?UserImages=31994&session=
Panel before covering with cloth.

http://ezinearticles.com/?How-To-Build-Jon-Rischs-DIY-Acoustic-Panels&id=310192
Detailed Instructions from a DIYer

http://calsprayfoam.com/how-to-build-jon-rischs-diy-acoustic-panels/
as above

https://www.canuckaudiomart.com/details/112706-acoustic_absorption_panels__jon_risch_diy_design/images/119036/

Acoustic CLOTH Sources:

Guilford of Maine Fabric
http://www.guilfordofmaine.com/
http://www.cinemadesignbuild.com/store/subcategory.asp?CategoryID=6&SubCategoryID=1
http://www.acousticalsolutions.com/products/fabrics/guilford.asp

Acoustone Speaker Grille Cloth
http://www.acoustonegrillecloth.com/about.htm
http://www.acousticalsolutions.com/products/fabrics/grille_cloth.asp

Others:
http://www.alphasoundandlighting.com/proaudio/acoustic_speaker_fabric.html

*****************************************************************

the original post where I reveal the latest Super Quick & Dirty easy bass traps recipe:
http://www.audioasylum.com/audio/tweaks/messages/15737.html
and petew's post where he goes into detail on what he did.
http://www.AudioAsylum.com/audio/general/messages/70817.html

These are by far the best bang for the buck bass traps (and easy to make too!), and will outperform almost ANY of the wall panels that some folks call "bass traps".

Jon Risch
- RE: If Bob24 is up to DIY, then see this post - bob24 14:42:06 03/16/20 (0)
  I just saw this post, Jon. Sorry! Health issues and my shrinking financial portfolio have kept me away.
  Will check out the your links when and if we recover from the virus mess.

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