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I'll be doing some loudspeaker measurements as time allows
The speakers are raised so that the acoustical axis about 2m from the ground (room as a height of 4m) - first lateral reflections are 4m away.
The measurements are made quite close at 50cm - but I take care in finding the acoustical axis of the speaker in question. I tried at 1m and further, but resolution got much worse in the lower frequency while making little to no difference as you go higher.
This is by no means a controlled environment, nor is my equipment high-end. This is done using a Dayton UMM6 and a simple laptop with a line out. Take these with a grain of salt is what I'm saying. While the measurements can be compared to one another, as the relative differences are correct, I am not claiming they are entirely accurate in itself.
Please not I am diverging from the ANSI 2034 standard - I have to do these at my work during breaks (it's a nice large room), so I try to these as efficient as possible.
Black = on-axis
Green (listening window) = 0° - 10° - 20° - 30° horizontal average plus up and down 10° from the 0° axis
Red (early horizontal reflections) = 40° - 50° - 60° - 70°- 80° horizontal average
Bottom = early horizontal reflection directivity index
I'll be adding more and more as time allows
The speakers are raised so that the acoustical axis about 2m from the ground (room as a height of 4m) - first lateral reflections are 4m away.
The measurements are made quite close at 50cm - but I take care in finding the acoustical axis of the speaker in question. I tried at 1m and further, but resolution got much worse in the lower frequency while making little to no difference as you go higher.
This is by no means a controlled environment, nor is my equipment high-end. This is done using a Dayton UMM6 and a simple laptop with a line out. Take these with a grain of salt is what I'm saying. While the measurements can be compared to one another, as the relative differences are correct, I am not claiming they are entirely accurate in itself.
Please not I am diverging from the ANSI 2034 standard - I have to do these at my work during breaks (it's a nice large room), so I try to these as efficient as possible.
Black = on-axis
Green (listening window) = 0° - 10° - 20° - 30° horizontal average plus up and down 10° from the 0° axis
Red (early horizontal reflections) = 40° - 50° - 60° - 70°- 80° horizontal average
Bottom = early horizontal reflection directivity index
I'll be adding more and more as time allows
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