Subject: ITU worst case listening position - how? From: Nils Peters <nils.peters@xxxxxxxx> Date: Sun, 28 Mar 2010 17:24:31 -0400 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>Hi, I hope someone from this list can help out, the ITU people could not sufficiently answer my question. The ITU-R BS.1116-1 recommendation "METHODS FOR THE SUBJECTIVE ASSESSMENT OF SMALL IMPAIRMENTS IN AUDIO SYSTEMS INCLUDING MULTICHANNEL SOUND SYSTEMS" (p.18, Figure 7) defines the typical 5 channel surround loudspeaker setup including the best (central) and worst case listening positions. Here my question: What are the underlying assumptions/calculations that make these specific listening positions to the "worst case listening positions" ? The text on the same pages also defines the recommended listening area which has a radius of 0.7 m around the central position. I am also wondering where this number comes from. thanks for any comment. Nils