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02-20-15 06:31 PM
nergenek
Re: Room Acoustics...need help for analysis

Many thanks...you are giving me very valuable hints...so you are an expert and the only one who is helping me...

During the WE I will make more measurements with the curtains closed and the door closed and see the results...if anything remarkable I will post the results...

Have a nice WE...
02-20-15 06:05 PM
Blacklightning
Re: Room Acoustics...need help for analysis

Now I'm no expert but this is what I see.
Blue = Right
Red = Left

Impulse chart, this will let you know how your speakers will image. You want the Impulse to be the same. Your Right speaker is reflecting more "echos" than your left speaker. You can see this at 2 ms, 8ms, 11ms, 13-14ms.

Frequency response, You do not have large peaks and nulls. I'm guessing the door was open when you ran this. Your bass seems a little high from 80-50hz. Not a big deal.

Waterfall, your room rings at the low end. Bass traps are in order.

Overall I like what I see. Start with a few panels and go from there. Work on getting the right and left sounding the same.
02-20-15 05:19 PM
nergenek
Re: Room Acoustics...need help for analysis

L and R measurements .mdat file is now attached...They are pretty different as on the right side there is a window and on the left side there is an open door...

Anyway I hope that some analysis and recommendations from the experts will follow
02-18-15 10:50 AM
Blacklightning
Re: Room Acoustics...need help for analysis

Forget about diffusor's at this point go for absorption.

http://hofa-akustik.de/en/modules/absorber-eco/

Get a couple of those and test for your reflection points.

Run a full sweep with just the left speaker and then just the right and post the REW file. When I did this the guys here really helped me out and I was able to pin point problems.

Diffusion are tricky and need to be tuned to problem frequencies (I believe) they should be the last thing you do in a medium sized room. "I" would not use Diffusion in your room at all as it is on the small side.

I think your reelection at 1-3ms (Milliseconds) is from the sloped wall above your speakers and the reflection right after 5ms is from the left wall.
02-18-15 04:03 AM
nergenek
Re: Room Acoustics...need help for analysis

Thank you JohnM and Blacklightning for your replies which are supporting my feelings about the sonic response of my room...

Do you think that this kind of panels ( http://hofa-akustik.de/en/modules/diffusor/ ) placed at the available places on the walls will help to reduce some reflection ?
02-17-15 07:03 PM
Blacklightning
Re: Room Acoustics...need help for analysis

Looking at your data and room pics the DAAD's are helping the room but Bass traps are the last thing you need.
Your speakers are doing very well in that room and I wish my results are on par with yours after I'm done with treatment.

From what I have read diffuse are great for large rooms and are the last step for getting the final 5% out of your medium size room.

If I was you I would play around with some simple panels and try and reduce your 5ms reflection.
02-17-15 06:15 PM
nergenek
Re: Room Acoustics...need help for analysis

As the furnitures permit I tried all the different places in the room for the placement of the acoustical elements and frankly speaking I did not hear any substantial sonic differences...that's why I went down to the measurement way to see if science will show me some important differences to convince me spending all this budget for these elements
02-17-15 05:29 PM
JohnM
Re: Room Acoustics...need help for analysis

The peak around 52 Hz is reduced a little and certainly decays faster with the devices, and the response overall is slightly smoother, but there isn't a substantial impact anywhere else. The locations of the devices in the room will affect how well they work, though probably somewhat unpredictably, so worth experimenting. Might get more substantial changes from some acoustic panels, but other folk here are much better qualified to comment on possible treatment options so I hope some will chime in. Does it sound much different with the devices in place?
02-17-15 04:17 PM
nergenek
Re: Room Acoustics...need help for analysis

OK thank you for your help...
The related .mdat files are attached...
02-17-15 04:12 PM
JohnM
Re: Room Acoustics...need help for analysis

Not the best sub-forum for this post, I'll move it to the Home Audio Acoustics forum. It would be good to attach the .mdat file for your measurement so people can see other views of the data, such as the waterfall and the unsmoothed low frequency behaviour.
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