ITU worst case for 5.1 (Kevin Austin )


Subject: ITU worst case for 5.1
From:    Kevin Austin  <kevin.austin@xxxxxxxx>
Date:    Mon, 29 Mar 2010 20:07:17 -0400
List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>

Most of the home theater 5.1 systems I have seen in friends' houses have had the speakers placed wherever there happens to be a space for them. By the definition I would take it that there is one "best" position, and several hundred bad and worst case positions. In many situations I've seen, a 1.4 meter sweet spot is unusually large. Kevin > Date: Sun, 28 Mar 2010 17:24:31 -0400 > From: Nils Peters <nils.peters@xxxxxxxx> > Subject: ITU worst case listening position - how? > > 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


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