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Old 13th April 2013, 07:30 PM   #2151
graaf is offline graaf  Poland
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this one seems interesting:

Click the image to open in full size.

Click the image to open in full size.
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Old 14th April 2013, 12:04 PM   #2152
Elias is offline Elias  Finland
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Here we are back on perception of elevation of phantom images. My quick test earlier in this thread indicated high freqs should be directed at the ceiling, or lifted at the ear level, otherwise they seem to be perceived at very low.

Maybe this was not allways like this, or some people hear things differently.
For example here's Michael Gerzon listening setup for matrixed 4 speaker stereo. Quad ESL are placed on the floor, and due to their backwards tilt the high freqs radiate directly to listening position. The incidence angle seems rather low. Still this setup was used in high quality research at the time.


Click the image to open in full size.


Click the image to open in full size.


Interesting question is since when tweeters got placed at the ear level in hifi systems ?


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Old 14th April 2013, 03:15 PM   #2153
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If I would have to guess where the sound is coming from based on his posture, it's coming from the floor
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Old 15th April 2013, 07:12 AM   #2154
graaf is offline graaf  Poland
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and from the posture of this doll:

Click the image to open in full size.

I guess that she quite likes it this way, on the floor
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Old 15th April 2013, 07:16 AM   #2155
graaf is offline graaf  Poland
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but is it coming from the floor really??

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Old 20th April 2013, 05:42 PM   #2156
Elias is offline Elias  Finland
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Quote:
Originally Posted by markus76 View Post
If I would have to guess where the sound is coming from based on his posture, it's coming from the floor
Look, so many tweeters on the floor level The sound must be coming from the floor, right

Click the image to open in full size.
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Last edited by Elias; 20th April 2013 at 05:44 PM.
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Old 20th April 2013, 05:43 PM   #2157
Elias is offline Elias  Finland
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Quote:
Originally Posted by graaf View Post
and from the posture of this doll:

Click the image to open in full size.

I guess that she quite likes it this way, on the floor

She likes ?!? It rather looks she is pulling her hair out
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Old 20th April 2013, 05:50 PM   #2158
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Quote:
Originally Posted by Elias View Post
Look, so many tweeters on the floor level The sound must be coming from the floor, right
Look at the polar diagrams - the 0 degrees axis IS at floor level
Nevertheless, a "full" CBT with the 0 degress axis at ear level is probably a great idea.
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Old 20th April 2013, 05:56 PM   #2159
Elias is offline Elias  Finland
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Quote:
Originally Posted by markus76 View Post
Look at the polar diagrams - the 0 degrees axis IS at floor level
Yes, and the focal point of the waveform is indeed at the floor.
Click the image to open in full size.


So, suddenly Keele's CBT has become a next worst thing, the sound is coming from the floor

But why no one is bothered by this fact ?


Quote:
Originally Posted by markus76 View Post
Nevertheless, a "full" CBT with the 0 degress axis at ear level is probably a great idea.
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.


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Old 20th April 2013, 06:23 PM   #2160
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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.


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I believe that approach radiates too much energy into the room.
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