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Old 21st April 2013, 06:07 AM   #2161
graaf is offline graaf  Poland
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Quote:
Originally Posted by Elias View Post
Yes, and the focal point of the waveform is indeed at the floor.
Click the image to open in full size.
not just that, there is more - the sound radiated by the floor level speakers is the loudest and the earliest reaching the listener

yet the sound is not coming from the floor


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Originally Posted by Elias View Post
I think floor to ceiling straight array is better, no floor and ceiling reflections, and the sound is allways coming from your ear height regardless sitting or standing.
- Elias
probably a floor to ceiling line source - like Beveridge - is best, but I am not so sure about a floor to ceiling straight array of discrete elements
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Old 21st April 2013, 10:11 AM   #2162
Elias is offline Elias  Finland
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Originally Posted by graaf View Post
yet the sound is not coming from the floor
How do we know that ? Maybe it is coming from the floor

If the CBT waveform is really a circular arch focused from a point located at the floor, and if the sound would not be perceived as coming from the floor, it would mean we would not be able to perceive source elevation.
This is not the case since the sound from any point source placed at the floor and aimed to the listener is perceived as coming from the floor.

Then how is CBT different in perceptual sense ?
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Old 21st April 2013, 03:58 PM   #2163
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maybe it's just better to fix speakers into ceiling right above listening position
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Old 21st April 2013, 07:43 PM   #2164
graaf is offline graaf  Poland
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Quote:
Originally Posted by Elias View Post
the sound from any point source placed at the floor and aimed to the listener is perceived as coming from the floor.
not when a ceiling is present

http://www.diyaudio.com/forums/multi...ml#post3180924
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Old 21st April 2013, 07:46 PM   #2165
graaf is offline graaf  Poland
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Quote:
Originally Posted by piotr z View Post
maybe it's just better to fix speakers into ceiling right above listening position
because?

I believe that:
http://www.diyaudio.com/forums/multi...ml#post3164641
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Old 21st April 2013, 08:44 PM   #2166
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Originally Posted by Elias View Post
Then how is CBT different in perceptual sense ?
It isn't. The CBT doesn't radiated much energy towards the ceiling. That's one of its main features, controlled vertical directivity. No secondary virtual height source is created. The ceiling reflection simply isn't strong enough.
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Old 21st April 2013, 08:46 PM   #2167
Elias is offline Elias  Finland
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Quote:
Originally Posted by graaf View Post
But CBT is no flooder, it has vertical beamwidth of only about +-22 degrees. It will not illuminate the ceiling in typical home listening room to provide a strong enough ceiling reflection to lift the image from the floor.

Click the image to open in full size.
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Old 21st April 2013, 08:49 PM   #2168
Elias is offline Elias  Finland
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Originally Posted by markus76 View Post
It isn't. The CBT doesn't radiated much energy towards the ceiling. That's one of its main features, controlled vertical directivity. No secondary virtual height source is created. The ceiling reflection simply isn't strong enough.
That's what I was saying

CBT creates images coming from the floor ?
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Old 21st April 2013, 08:55 PM   #2169
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Ask Omholt. He has a floor coupled CBT.
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Old 21st April 2013, 09:17 PM   #2170
wesayso is offline wesayso  Netherlands
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Put the CBT on it's side at ear height in the corner (maybe a bit in front of the back wall) with the bottom against the side wall, problem solved?

I had exactly the same thought about the CBT and it's floor centred wave front:
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Originally Posted by wesayso View Post
Trace back the origin of the sound and you end up on floor level. There is the acoustic center of your (virtual) point source.
That's why I said I would hang it from the ceiling. But I'd rather have a 60 degree version floating between the ceiling and the floor (if you have the space)
http://www.diyaudio.com/forums/newre...eply&p=3434738

But the response of someone that heard it:
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Originally Posted by Pano View Post
Maybe in theory, but it never sounded that way to me.

Last edited by wesayso; 21st April 2013 at 09:19 PM.
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