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Multi-Way Conventional loudspeakers with crossovers

The Advantages of Floor Coupled Up-Firing Speakers
The Advantages of Floor Coupled Up-Firing Speakers
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Old 1st March 2013, 09:06 PM   #1871
markus76 is offline markus76  Germany
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Originally Posted by ScottG View Post
But you still process for a variety of vertical axis's.
Yes, but this is based on pinna cues not on ILD or ITD. Pointing a speaker up and down doesn't shift the auditory event up or down, reflections do.
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Old 1st March 2013, 10:00 PM   #1872
ScottG is offline ScottG  United States
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Originally Posted by markus76 View Post
Yes, but this is based on pinna cues not on ILD or ITD.

Pointing a speaker up and down doesn't shift the auditory event up or down, reflections do.

Note, what you are referring to is far more directional than what I'm suggesting.

Hmm.. how to describe this..

The research in the area you are referencing is concerned with absolute direction, primarily 0 degree forward, 0 degree upward, and 0 degree rearward relative to the listener.

IF we were to say that an image was more vertical under these conditions, it be more like looking up for a sound source. The *angle* for detection is altered. If looking at the floor as a 2d "X/Y" graph, the image would have moved along the Y axis, effectively toward your position.

Now a very high amplitude reflection (relative to much lower direct sound), can achieve this effect.


What I'm describing is a bit different.


The image remains in it's same location (from the 2d X/Y of the floor), but rather it's image is moved a bit higher (..now a 3d "Z" axis). Under this sensation it's NOT like looking "up". It's more like an image, say a singer - is higher than he or she was before.

This is still very much an ILD (broad-band) and ITD (..up to about 4k) mechanism.


The very same effect should happen with the IMP (on the other thread) because of the intensity difference from the rear relative to the front (6db higher in the rear drivers relative to the near front driver) - basically shifting images/performers rear-ward to a marginal extent. (..possibly even increasing their apparent depth or "stretching" images ever so slightly in the depth plane because of the differences in direct sound from the forward drivers and the reward drivers.)
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Old 2nd March 2013, 05:44 PM   #1873
markus76 is offline markus76  Germany
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I wasn't talking about an image becoming very tall but about focused localization of an auditory event higher than the sound source.
I even wouldn't know if the sensation of a tall but narrow auditory events even exists although I suspect that there is a difference between spaciousness created by side wall reflections and side wall/side-height reflections.
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Old 3rd March 2013, 01:34 PM   #1874
Elias is offline Elias  Finland
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Some more 'flooders'

Heil A.M.T. de


Kithara
Click the image to open in full size.

Click the image to open in full size.


Syrinx
Click the image to open in full size.


Aulos
Click the image to open in full size.

Click the image to open in full size.
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Old 3rd March 2013, 01:50 PM   #1875
Rudolf is offline Rudolf  Germany
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Aren't they all sort of "Plutos"?
Flooder "directivity" just up to the point, where directivity starts to count really. Then changing to plain old forward directivity ...
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Old 3rd March 2013, 01:54 PM   #1876
Elias is offline Elias  Finland
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I think they are a sort of 'inverse flooders' It should be other way around, true.
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Old 3rd March 2013, 02:05 PM   #1877
markus76 is offline markus76  Germany
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Originally Posted by Rudolf View Post
Aren't they all sort of "Plutos"?
Flooder "directivity" just up to the point, where directivity starts to count really. Then changing to plain old forward directivity ...
Yes, I'd also think the main benefit is bringing woofer and tweeter (slightly) closer together. Pointing the woofer upwards has probably no additional effect.
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Old 3rd March 2013, 02:12 PM   #1878
Rudolf is offline Rudolf  Germany
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The forward tilted midrange reminds me of the Gradient Helsinki. Salmi is claiming some advantage for that.
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Old 3rd March 2013, 07:02 PM   #1879
graaf is offline graaf  Poland
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Quote:
Originally Posted by Rudolf View Post
The forward tilted midrange reminds me of the Gradient Helsinki. Salmi is claiming some advantage for that.
actually Salmi is claiming some advantage for tilting it back

and not just that - also cardioid radiation pattern
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Old 3rd March 2013, 08:29 PM   #1880
graaf is offline graaf  Poland
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Originally Posted by graaf View Post
cardioid radiation pattern
which is there mainly to reduce the floor reflection resulting directly from the fact that the midbass unit is raised off the floor, that is from a deviation from a floor coupled up-firing configuration ideal of Snell Type One or the original Fostex flooder of this thread
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