Recent content by ernestcarl

I’ve been too preoccupied with other things (and just lazy to haul back) to test this with my FX50, but I do believe this method at least gets one reasonably close enough to the direct anechoic response average as well as power response and reflections included (with usually some more minor...

64k sample count export in REW appears equivalent to 65536 taps. Re-import the exported file into REW and look at the sample count indicated in the measurement notes.

Are you correcting the phase here for just the horn? Or a more complex multi-way? Personally, I don't like to bother with target curves. I manipulate the excess phase/actual phase manually via rePhase. And then convolve the generated filter(s) with the raw measurement and compare. It's easier...

Hedd not Adam. I confused the two.

"Electrically", I don't think the same issue applies with the kind of time smearing side-effect seen with physical transducers. It appears we are more sensitive to precausal/acausal effects at low frequencies -- papers/studies were posted elsewhere before... As dfuller stated, since there is no...

PA manufacturer web or PA news sites might have more information and case studies about individual installations. In America: https://www.danleysoundlabs.com/applications/sport-venues/ https://meyersound.com/sports/ https://www.fulcrum-acoustic.com/markets-served/sports-stadiums-and-arenas/...

Funny -- seasoned (maybe), not exactly "expert" as I don't even have a good grasp of some of its other features. I've actually been using the more "stable" standard release version recently in my old Win 10 laptop which I prefer to use for quick REW measurements over Linux. Now, I am a little...

Then continue on…

I don’t particularly have any strong viewpoint whether his approach is right or wrong. At this point you are beginning to sound like a broken record on continuous replay, though.

I suppose so, yes. To be frank, I really do not do DIY speaker builds myself. If one were to move either speaker, the timing reference would no longer be accurate. I think it works well enough, for "testing" already finished speakers. But I did slightly re-do the xo EQ here which meant the...

As I said, I use completely different speaker (so not exactly the DUT) that is already setup nearby as my acoustic time reference. When doing individual driver measurements recently on my RX699, for example, I used my Neumann KH120 as the reference and told REW to automatically adjust the time...

I use another speaker for the acoustic time reference. However, even then, my results can sometimes be off or a glitch can occur in the middle of a sweep so I now do repeated measurements and discard measurements that look off -- by looking at the IR/step and phase.

Yes, you really have to measure each driver individually at the same reference distance. You probably already know this, but REW's alignment tool feature can be a great visual aid here: *polarity of LF MW inverted in second plot ---- Assuming that none of the drivers are broken, perhaps a...

This first step considered as individual “driver” correction level seems questionable to me. It can be a useful data point, but I would not bother to make a correction filter from such a close proximity measurement. I know you eventually convolve multiple filters so the final filter ends up very...

I would only move furniture away if it is readily mobile -- e.g. chair for a desk ~vs~ calibration microphone and its floor stand. I have speakers directly facing beds in bedrooms... am I supposed to dismantle and move queen-sized bed furniture outside first? How about the chairs inside the...