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#1
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How bad is this room?
Today I received the UMIK-1 microphone, so I did my first REW measurement. I am going to move soon, but I am curious about the room acoustics for my current system.
I just ordered a book " Master Handbook of Acoustics, Sixth Edition" on Amazon. Before I am able to "decode" the graphs generated by REW, can anyone point out what you can see from the attached measurement results? Thanks |
#2
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The waterfall graph is the decay time or how long the certain frequencies persist and how long after the speaker has stopped producing that note... The more ridges you have, the more frequencies are at play. The amplitude and time should be self explanatory... |
#3
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What I read from the waterfall is: the low frequencies have long decay time, which means "muddy" room; the high frequencies have short decay time, which means "muffled" room. Do I read it correctly? |
#4
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You want a perfect waterfall response and hear what a perfect room would sound like??? Get a decent set of headphones. Seriously, there is NO ROOM there. |
#5
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This is a great point and true. I've always wondered what technically causes this. Maybe some sort of lower midrange decay issue?
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#6
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I'm sure it can be explained in technical terms, that is not something that I can explain properly. Of course it has to do with room acoustics and how the speaker interacts with the room. It is similar to bringing a hand to your mouth as you are talking and your voice perceived by the listener will sound different, much like using your voice and getting close to any wall in the room will have the same effect.
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#7
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Believe it or not, it ISN'T as bad as you think.
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#8
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Try adding 1/6 smoothing to the SPL graph. It will remove the comb filtering noise and allow you ‘see’ the fundamentals.
From the rough data, it appears your system/room is really falling off at the upper frequencies. That probably sounds dull or damped. Can you tell us a little more about your room and system? I know what amplifier you have . Dimensions, speakers, existing furniture or room treatments etc??
__________________
Main Equipment: Kharma Elegance dB11-S, JL Audio F113v2 X 2, Block Audio Line & Mono SE Amplification, Bricasti M21 DAC, Antipodes Kala K-50 Server, Clearaudio Performance SE. Satisfy tonearm & Maestro Wood MM cartridge. Power: Shunyata Everest 8000, Sigma XC v2, Sigma NR v2, Block Audio PCs, Defender, ADDPowr Wizard Grounding: Shunyata Altaira CGS - 4 X Alpha CGS cables, Network : Supra Cat 8+, Twin (Nenon) Modified Buffalo GS2016 Switches, Keces P3 LPSU, Cables: Wireworld Platinum 8 USB, Wireworld Platinum Eclipse 8 Speaker cables, 6M & 1M Tubulus Concentus ICs, Other:Two PSI Audio AVAA C20, Multiple GIK products, Stillpoint Apertures, Stillpoint Minis and Ultra SS, Three 20 Amp lines, Furutech GTX - Gold outlets, Adona Rack |
#9
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System: MC402+KEF 105/3 (when measuring the room, I did not connect the 2 subs); Room: play room on the 2nd floor, 20x20x8, with two 6x7 "openings" (not windows) in the left and right, and stairs in the back, bookshelves in the left and right, zero room treatment. |
#10
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How bad is this room?
If your room is reasonably symmetrical, try using the room simulator function in REW to model your room and speaker &listening position. If your existing setup closely resembles your measurement, you can use the model to move your speakers and or listening position to see the impact of this moves on decay and the spl x frequency graph.
Can save some time of hunting. BUT and this is what Serge is getting at, only use the measurements to learn the characteristics of your room and to speed getting you into the ballpark of speaker placement. Then you need to put the computer away and let your ears guide final placement decisions.
__________________
Main Equipment: Kharma Elegance dB11-S, JL Audio F113v2 X 2, Block Audio Line & Mono SE Amplification, Bricasti M21 DAC, Antipodes Kala K-50 Server, Clearaudio Performance SE. Satisfy tonearm & Maestro Wood MM cartridge. Power: Shunyata Everest 8000, Sigma XC v2, Sigma NR v2, Block Audio PCs, Defender, ADDPowr Wizard Grounding: Shunyata Altaira CGS - 4 X Alpha CGS cables, Network : Supra Cat 8+, Twin (Nenon) Modified Buffalo GS2016 Switches, Keces P3 LPSU, Cables: Wireworld Platinum 8 USB, Wireworld Platinum Eclipse 8 Speaker cables, 6M & 1M Tubulus Concentus ICs, Other:Two PSI Audio AVAA C20, Multiple GIK products, Stillpoint Apertures, Stillpoint Minis and Ultra SS, Three 20 Amp lines, Furutech GTX - Gold outlets, Adona Rack |
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