Yep, that certainly agrees with my experience in the past with earlier and
cruder decoders over larger areas.
Dave
On 3 March 2016 at 23:40, Aaron Heller <hel...@ai.sri.com> wrote:
> In BLaH11 (AES 137, 10/2014, Los Angeles) , Eric and I compared horizontal
> FOA over a 2-meter radius 4-speaker diamond vs. 8-speaker octagon with
> binaural dummy head measurements and listening tests. (classic decoding:
> 2-band, rV=1 at LF, rE=sqrt(1/2) at HF, 400 Hz xover, NFC).
>
> The TL;DR summary is yes, with 8 speakers what Solvang/2008 calls spectral
> impairment is clearly audible in the vicinity of the sweet spot as an HF
> rolloff or dullness of the sound, but as you move away from the central
> location, the soundfield collapses to the nearest loudspeaker much faster
> with only 4 loudspeakers.
>
> Here's the AES permalink for the paper.
>
> http://www.aes.org/e-lib/browse.cfm?elib=17452
>
> --
> Aaron (hel...@ai.sri.com)
> Menlo Park, CA US
>
> On Thu, Mar 3, 2016 at 11:32 AM, Martin Leese <
> martin.le...@stanfordalumni.org> wrote:
>
> > Martin Leese wrote:
> >
> > > Peter Lennox wrote:
> > >> Following on from discussions of decoder solutions: Forgive me if
> I've
> > >> missed this (I've been watching sursound for about 20 years, or so -
> but
> > >> I
> > >> just may have missed the odd discussion!)
> > >>
> > >> Has anyone systematically studied the interactions between decoders,
> > >> speaker
> > >> layouts and particular rooms?
> > >
> > > Dermot Furlong looked at the last two in the
> > > early 1990s. He made a lengthy post to
> > > "sursound" in June 1996 describing his work.
> > > This post used to be available in my area on
> > > the Ambisonia.com site, but it seems to have
> > > been deleted. I still have the files, but am not
> > > sure of the best way for making them available.
> > >
> > > ...
> > >> (and I haven't even mentioned the possible
> > >> variety of speaker dispersion characteristics!)
> > >
> > > Dermot also looked at this.
> >
> > I have made the research of Dermot Furlong
> > available on one of my Google Sites at:
> > https://sites.google.com/site/mytemporarydownloads/
> >
> > Scroll down to the section "Ambisonic stuff"
> > and look for the file "dermot.zip".
> >
> > Regards,
> > Martin
> > --
> > Martin J Leese
> > E-mail: martin.leese stanfordalumni.org
> > Web: http://members.tripod.com/martin_leese/
> > _______________________________________________
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> >
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--
As of 1st October 2012, I have retired from the University.
These are my own views and may or may not be shared by the University
Dave Malham
Honorary Fellow, Department of Music
The University of York
York YO10 5DD
UK
'Ambisonics - Component Imaging for Audio'
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