One thing seemed to be prevalent: a very sharp resonance at approx 150Hz, and a prominent room mode at 30Hz. So after rearranging my office, I took a few very quick captures today. Hopefully my math and quick notations are correct! (Note almost all reflections are near 30 db down.) Here is a quickly annotated graph using the one you chose. We should be able to dial this in rather quickly. If you like, PM me and we can talk via Skype or YahooMessenger, or if in the US, by phone. You will still have a strong early reflection off the work surface!īear with me here, as I am running in and out today. Angling them down might help a Little, but it will not remove the reflection problem off the work surface to any significant degree. Or even better, diffusing them the create a bit more of s semi-diffuse soundfield.Īnd regarding the workstation orientation relative to the speakers - yes, the inconvenience is exactly why I suggested optimal solutions are difficult. It would be worth isolating one or two and noting any audible differences. As the later arriving soundfield decays, their additional gain relative to the soundfield can become a problem and cause image shifts, although they are still too early to be perceived as distinct echoes (that occurs over ~ 80ms of delay).
but no excuse!) It is the level of the reflections relative to the direct signal that prompted me to comment regarding the RFZ! As you aspire to this level of absorption in the ISD gap! -)īut I might recommend you isolate each of the later arriving paths and use your absorption to treat them. As each vertical gain graticule is 10 dB (I think this is what sidetracked me above with the time graticules. The remaining reflections are ~30 or more dB down, rendering them 'insignificant' relative the the direct signal. Take a look at the attached annotated ETC for updated arrival times and corresponding distances. My comments in large measure still stand. And I doubt it it 45.6 ms, as that would mean that the mic was 51.5 feet away. So your rig has a latency (propagation delay) of ~45.6ms.as I cannot ascertain the actual zero reference point relative to the speaker itself to determine the distance of the mic from the speaker.
#SETTING UP FUZZMEASURE PORTABLE#
Yes, in my rushing around and playing with this on a portable while traveling (I know - braindead.) I misread the scale. And later arriving reflections from an uneven rear wall are comparatively rather easily addressed. This would provide symmetry for the early reflections greatly impacting imaging. I would heartily agree with Ethan regarding moving the speakers to the window-wall.
But the attached procedure, assuming FM does not auto-generate time/distance calculations allows one to identify the particular paths and reflection incident points without difficulty. Not knowing the exact placement of the speakers, it is difficult to identify a reference point from which to speculate about the specific reflection origins, be they side wall, irregular work surface (and possibly ceiling, and various sidewall surfaces) in the irregularly shaped small room. One can try damping the work surface, but I suspect a reorientation of the workspace is the fundamental solution where the work surface is pulled further from the wall and the speakers are mounted behind the surface and the where the work surface is isolated similarly to how pedestal mounting of the speakers relative to a large mix console where the negative angled direct signal dispersion is absorbed by the back of the board rather than being reflected off the work surface.īut this change is not trivial and will encounter objections from those who place convenience over function.ĮDIT: End edit
The work surface will create a significant early reflection that will not only impact intelligibility and skew the image, but you will have significant comb filtering and polar lobing in the direct signal. In reference to the speaker placement, this is a fatal flaw that is all too common in such workstation/table oriented environments. Otherwise it seems to say it is overdamped and on its way to being an RFZ except for the early order reflections.Īlso, it would be nice to have additional 'detail' for the time less than 50-60 ms. There should be more significant reflections that are less than 25-30dB down relative to the direct signal assuming that this is still a 'to be treated' room. I will note that I have questions regarding this measurement.
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