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Old 23rd March 2010, 03:42 PM   #921
el`Ol is offline el`Ol  Germany
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Originally Posted by el`Ol View Post
You neglect what walls do. They don't absorb all frequencies to the same degree. What you can achieve is an equal frequency response of all reflections.
And now I neglect what reflections do: They use to reflect again and again.
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Old 23rd March 2010, 03:45 PM   #922
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So what?
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Old 23rd March 2010, 03:51 PM   #923
el`Ol is offline el`Ol  Germany
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Originally Posted by markus76 View Post
A very good summary about what psychoacoustics knows can be found in Wittek's PhD thesis: http://hauptmikrofon.de/HW/Wittek_thesis_201207.pdf
Too many pages. Graaf?
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Old 23rd March 2010, 03:55 PM   #924
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Too many pages. Graaf?
The time writing spectulative posts without gaining any knowledge is much better invested reading stuff like Witteks thesis or Toole's http://www.harman.com/EN-US/OurCompa...ions/13686.pdf. If you really want to learn something, it doesn't get any easier than this.
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Old 23rd March 2010, 04:18 PM   #925
Key is offline Key  United States
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My problem with room correction software is it's not considering the entire chain. Without your brain converting vibrations to electricity and performing error corrections on it you do not have sound. With a mic you are measuring the vibrations in the room not the sound.
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Old 23rd March 2010, 04:39 PM   #926
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At lower frequencies the sum of direct and indirect sound is perceived AS ONE. That allows for room correction to work.
Then there's a transition to higher frequencies where direct sound and room response are perceived as two different entities (although only ONE sound sensation is perceived). So we end up measuring and correcting both at the same time. This is obviously wrong because our brain distinguishes between the direct and indirect sound field, the room correction does not.
All you can do is filter out the indirect sound field by gating the measured impulse response in order to optimize the loudspeaker frequency response (but then you could have used decent loudspeakers in the first place). The problem is that placing the microphone at the listening position renders the measurement useless. Either the gating time is too short and the frequency resolution becomes too coarse or the measured frequency response is contaminated with room reflections.
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Old 23rd March 2010, 04:42 PM   #927
Key is offline Key  United States
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The problem is perceptual coverage. With conventional stereo you get 60 degrees of controlled coverage and 300 degrees of errors.
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Old 23rd March 2010, 04:43 PM   #928
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Old 23rd March 2010, 04:53 PM   #929
Key is offline Key  United States
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!
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Old 23rd March 2010, 05:07 PM   #930
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Your statement does not make any sense to me so would you be so kind to explain?
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