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In Reply to: RE: I've tried absorption, diffusion posted by Ethan Winer on December 20, 2007 at 13:34:43
Yes, I know that graph, but you were using test tones, not music, you were using a single mike, not two ears connected to the human signal processing unit. The moment you are using a measurement setup that processes the audio data in a manner identical to human hearing (head related transfer function, auditory filter banks with critical bands, binaural decoloration etc.) the measurements can be considered as relevant for binaural listening to music.
"I suggest you at least try side-wall absorption, then let us know what happened. Or, if by chance you live anywhere near me, you are most welcome to come by for a visit and demo."
In my room reflections come from an angle of 60 and 65 degrees (asymmetric positioning), with a delay of around 10 ms. For this condition absolute thresholds for music are between -18 and -25 dB, depending on the music motive (for classical music). Radiation behaviour of my speakers alone reduces reflection level by at least 3 dB (200 Hz) and 12 dB (8 kHz). I would hence have to remove further 22 dB at 200 Hz, 13 dB at 8 kHz to get a RFZ. I don't think my wife would be very enthusiast about huge absorbers at the walls.
I'm living in Europe so no occasion to come to your place, as interesting that might be.
Klaus
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