Re: [Sursound] Wireless Solutions for Binaural Event

[Bo-Erik Sandholm]

ion depends on your prison :-)
> > >>> >>
> > >>> >> BR Bo-Erik
> > >>> >> On 21 Feb 2016 03:32, "Chris Timpson" <christimp...@gmail.com>
> > wrote:
> > >>> >>
> > >>> >> > Hi all
> > >>> >> >
> > >>> >> > Wondering if anyone has suggestions for a wireless headphone
> > >>> solution?
> > >>> >> I'm
> > >>> >> > working on a live event that will be a 30mins binaural sound
> > >>> experience
> > >>> >> in
> > >>> >> > a medieval prison for 24 audience members at a time. We need the
> > >>> audio
> > >>> >> to
> > >>> >> > begin simultaneously for all audience members and they will be
> > >>> walking
> > >>> >> > around between 3 locations. The distances aren't huge but quite
> a
> > >>> few
> > >>> >> walls
> > >>> >> > etc.
> > >>> >> >
> > >>> >> > I've been looking at silent disco type headphones but have
> > concerns
> > >>> >> about
> > >>> >> > the quality and also that the signal apparently is converted to
> > mono
> > >>> >> then
> > >>> >> > back to stereo during RF transmission. Anyone tested these?
> > >>> >> >
> > >>> >> > It could be that we use wired headphones with some kind of small
> > >>> >> playback
> > >>> >> > device that can somehow be remotely triggered to play. There
> will
> > >>> just
> > >>> >> be a
> > >>> >> > single audio file that plays from start to finish. Wondering if
> > >>> anyone
> > >>> >> has
> > >>> >> > tried to build something similar, or perhaps theres an existing
> > >>> solution
> > >>> >> > i've completely overlooked !?
> > >>> >> >
> > >>> >> > Many thanks,
> > >>> >> > Chris
> > >>> >> >
> > >>> >> >
> > >>> >> > Chris Timpson
> > >>> >> > *Director*
> > >>> >> > EarFilms
> > >>> >> > T: +44 (0)7888 695770
> > >>> >> > E: ch...@earfilms.com
> > >>> >> >
> > >>> >> > www.earfilms.com
> > >>> >> > -- next part --
> > >>> >> > An HTML attachment was scrubbed...
> > >>> >> > URL: <
> > >>> >> >
> > >>> >>
> > >>>
> >
> https://mail.music.vt.edu/mailman/private/sursound/attachments/20160220/4b8ebefc/attachment.html
> > >>> >> > >
> > >>> >> > ___
> > >>> >> > Sursound mailing list
> > >>> >> > Sursound@music.vt.edu
> > >>> >> > https://mail.music.vt.edu/mailman/listinfo/sursound -
> unsubscribe
> > >>> here,
> > >>> >> > edit account or options, view archives and so on.
> > >>> >> >
> > >>> >> -- next part --
> > >>> >> An HTML attachment was scrubbed...
> > >>> >> URL: <
> > >>> >>
> > >>>
> >
> https://mail.music.vt.edu/mailman/private/sursound/attachments/20160221/1265fb9e/attachment.html
> > >>> >> >
> > >>> >> ___
> > >>> >> Sursound mailing list
> > >>> >> Sursound@music.vt.edu
> > >>> >> https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe
> > >>> here,
> > >>> >> edit account or options, view archives and so on.
> > >>> >>
> > >>> >
> > >>> >
> > >>> >
> > >>> > --
> > >>> > www.augustineleudar.com
> > >>> >
> > >>>
> > >>>
> > >>>
> > >>> --
> > >>> www.augustineleudar.com
> > >>> -- next part --
> > >>> An HTML attachment was scrubbed...
> > >>> URL: <
> > >>>
> >
> https://mail.music.vt.edu/mailman/private/sursound/attachments/20160221/764e1c08/attachment.html
> > >>> >
> > >>> ___
> > >>> Sursound mailing list
> > >>> Sursound@music.vt.edu
> > >>> https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe
> > here,
> > >>> edit account or options, view archives and so on.
> > >>>
> > >>
> > >>
> > >>
> > >> --
> > >>
> > >> 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'
> > >>
> > >
> > >
> > >
> > > --
> > >
> > > 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'
> > >
> >
> >
> >
> > --
> >
> > 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'
> > -- next part --
> > An HTML attachment was scrubbed...
> > URL: <
> >
> https://mail.music.vt.edu/mailman/private/sursound/attachments/20160222/774a162e/attachment.html
> > >
> > ___
> > Sursound mailing list
> > Sursound@music.vt.edu
> > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here,
> > edit account or options, view archives and so on.
> >
> -- next part --
> An HTML attachment was scrubbed...
> URL: <
> https://mail.music.vt.edu/mailman/private/sursound/attachments/20160222/bc648f77/attachment.html
> >
> ___
> Sursound mailing list
> Sursound@music.vt.edu
> https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here,
> edit account or options, view archives and so on.
>
-- next part --
An HTML attachment was scrubbed...
URL: 
<https://mail.music.vt.edu/mailman/private/sursound/attachments/20160223/a0c4182e/attachment.html>
___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.

Re: [Sursound] Wireless Solutions for Binaural Event

[Chris Timpson]

t; to
> >>> >> > begin simultaneously for all audience members and they will be
> >>> walking
> >>> >> > around between 3 locations. The distances aren't huge but quite a
> >>> few
> >>> >> walls
> >>> >> > etc.
> >>> >> >
> >>> >> > I've been looking at silent disco type headphones but have
> concerns
> >>> >> about
> >>> >> > the quality and also that the signal apparently is converted to
> mono
> >>> >> then
> >>> >> > back to stereo during RF transmission. Anyone tested these?
> >>> >> >
> >>> >> > It could be that we use wired headphones with some kind of small
> >>> >> playback
> >>> >> > device that can somehow be remotely triggered to play. There will
> >>> just
> >>> >> be a
> >>> >> > single audio file that plays from start to finish. Wondering if
> >>> anyone
> >>> >> has
> >>> >> > tried to build something similar, or perhaps theres an existing
> >>> solution
> >>> >> > i've completely overlooked !?
> >>> >> >
> >>> >> > Many thanks,
> >>> >> > Chris
> >>> >> >
> >>> >> >
> >>> >> > Chris Timpson
> >>> >> > *Director*
> >>> >> > EarFilms
> >>> >> > T: +44 (0)7888 695770
> >>> >> > E: ch...@earfilms.com
> >>> >> >
> >>> >> > www.earfilms.com
> >>> >> > -- next part --
> >>> >> > An HTML attachment was scrubbed...
> >>> >> > URL: <
> >>> >> >
> >>> >>
> >>>
> https://mail.music.vt.edu/mailman/private/sursound/attachments/20160220/4b8ebefc/attachment.html
> >>> >> > >
> >>> >> > ___
> >>> >> > Sursound mailing list
> >>> >> > Sursound@music.vt.edu
> >>> >> > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe
> >>> here,
> >>> >> > edit account or options, view archives and so on.
> >>> >> >
> >>> >> -- next part --
> >>> >> An HTML attachment was scrubbed...
> >>> >> URL: <
> >>> >>
> >>>
> https://mail.music.vt.edu/mailman/private/sursound/attachments/20160221/1265fb9e/attachment.html
> >>> >> >
> >>> >> ___
> >>> >> Sursound mailing list
> >>> >> Sursound@music.vt.edu
> >>> >> https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe
> >>> here,
> >>> >> edit account or options, view archives and so on.
> >>> >>
> >>> >
> >>> >
> >>> >
> >>> > --
> >>> > www.augustineleudar.com
> >>> >
> >>>
> >>>
> >>>
> >>> --
> >>> www.augustineleudar.com
> >>> -- next part --
> >>> An HTML attachment was scrubbed...
> >>> URL: <
> >>>
> https://mail.music.vt.edu/mailman/private/sursound/attachments/20160221/764e1c08/attachment.html
> >>> >
> >>> ___
> >>> Sursound mailing list
> >>> Sursound@music.vt.edu
> >>> https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe
> here,
> >>> edit account or options, view archives and so on.
> >>>
> >>
> >>
> >>
> >> --
> >>
> >> 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'
> >>
> >
> >
> >
> > --
> >
> > 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'
> >
>
>
>
> --
>
> 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'
> -- next part --
> An HTML attachment was scrubbed...
> URL: <
> https://mail.music.vt.edu/mailman/private/sursound/attachments/20160222/774a162e/attachment.html
> >
> ___
> Sursound mailing list
> Sursound@music.vt.edu
> https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here,
> edit account or options, view archives and so on.
>
-- next part --
An HTML attachment was scrubbed...
URL: 
<https://mail.music.vt.edu/mailman/private/sursound/attachments/20160222/bc648f77/attachment.html>
___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.

Re: [Sursound] [allowed] Re: LaMonte Young - Just Charles & 'Cello in The Romantic Chord

[Gerard Lardner]

Sorry; mis-typed the link - I couldn't cut-'n-paste it between apps on 
my phone. Try 
https://web.archive.org/web/20121007215033/http://www.youtube.com/watch?v=P7-hQ6TZTGk=US=en 
- It does work; I'm listening to it (wierd sound!)


Gerard


On 22/02/2016 16:56, John Leonard wrote:

Unfortunately, that leads to the “This video is unavailable” notice.

But thanks for looking.

John

Please note new email address & direct line phone number
email: j...@johnleonard.uk
phone +44 (0)20 3286 5942



On 22 Feb 2016, at 16:39, Gerard Lardner  wrote:

It seems to be still there on The Internet Archive:

___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.


___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.

Re: [Sursound] Different usages, different spaces, different decoders?

[Peter Lennox]

downloaded it, thanks
Dr. Peter Lennox
Senior Fellow of the Higher Education Academy
Senior Lecturer in Perception
College of Arts
University of Derby

Tel: 01332 593155

From: Sursound [sursound-boun...@music.vt.edu] On Behalf Of Eero Aro 
[eero@dlc.fi]
Sent: 22 February 2016 20:58
To: sursound@music.vt.edu
Subject: Re: [Sursound] Different usages, different spaces, different decoders?

Ok, here. I put it in my DB:

https://dl.dropboxusercontent.com/u/22100835/Comparative%20study%20of%20effective%20soundfield%20reconstruction%20Furlong%20AES%20198909012014_.pdf

I won't keep it there for a long time. Please download.

Eero
___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.

The University of Derby has a published policy regarding email and reserves the 
right to monitor email traffic. If you believe this was sent to you in error, 
please select unsubscribe.

Unsubscribe and Security information contact:   info...@derby.ac.uk
For all FOI requests please contact:   f...@derby.ac.uk
All other Contacts are at http://www.derby.ac.uk/its/contacts/
___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.

Re: [Sursound] Different usages, different spaces, different decoders?

[Eero Aro]

Ok, here. I put it in my DB:

https://dl.dropboxusercontent.com/u/22100835/Comparative%20study%20of%20effective%20soundfield%20reconstruction%20Furlong%20AES%20198909012014_.pdf

I won't keep it there for a long time. Please download.

Eero
___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.

Re: [Sursound] Different usages, different spaces, different decoders?

[Eero Aro]

Here's one paper Dermot that was involved with:

http://tinyurl.com/jnsla88

Can't find the other one...

Eero
___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.

Re: [Sursound] Different usages, different spaces, different decoders?

[Peter Lennox]

ah! - thanks - I know Dermot, I'll ask him
regards
ppl
Dr. Peter Lennox
Senior Fellow of the Higher Education Academy
Senior Lecturer in Perception
College of Arts
University of Derby

Tel: 01332 593155

From: Sursound [sursound-boun...@music.vt.edu] On Behalf Of Martin Leese 
[martin.le...@stanfordalumni.org]
Sent: 22 February 2016 20:28
To: sursound@music.vt.edu
Subject: Re: [Sursound] Different usages, different spaces, different 
decoders?

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.

Regards,
Martin
--
Martin J Leese
E-mail: martin.leese  stanfordalumni.org
Web: http://members.tripod.com/martin_leese/
___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.

The University of Derby has a published policy regarding email and reserves the 
right to monitor email traffic. If you believe this was sent to you in error, 
please select unsubscribe.

Unsubscribe and Security information contact:   info...@derby.ac.uk
For all FOI requests please contact:   f...@derby.ac.uk
All other Contacts are at http://www.derby.ac.uk/its/contacts/
___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.

Re: [Sursound] LaMonte Young - Just Charles & 'Cello in The Romantic Chord

[Paul Hodges]

--On 22 February 2016 14:51 + John Leonard 
wrote:

> I'm being nagged by a director who says that the various download
> sites that claim to have it are all virus/malware-infected.

To save others the trouble, I have dodged the viruses and so on, and am
currently downloading the torrent, which originated as AGP162
at.

Paul

-- 
Paul Hodges

___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.

Re: [Sursound] LaMonte Young - Just Charles & 'Cello in The Romantic Chord

[John Leonard]

Unfortunately, that leads to the “This video is unavailable” notice.

But thanks for looking.

John

Please note new email address & direct line phone number
email: j...@johnleonard.uk
phone +44 (0)20 3286 5942


> On 22 Feb 2016, at 16:39, Gerard Lardner  wrote:
> 
> It seems to be still there on The Internet Archive:

___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.

[Sursound] LaMonte Young - Just Charles & 'Cello in The Romantic Chord

[John Leonard]

Stab in the dark: does anyone have a copy of this piece? There are various CD-R 
versions floating around, as far as I can tell, but nothing readily available. 
I wouldn’t normally ask for something like this, but I’m being nagged by a 
director who says that the various download sites that claim to have it are all 
virus/malware-infected. There was a YouTube video, but it’s long gone.

Just checking before I tell him it’s a dead loss.

Thanks,

John

Please note new email address & direct line phone number
email: j...@johnleonard.uk
phone +44 (0)20 3286 5942


___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.

[Sursound] Fw: new important message

[klangfang]

Hello!

 

New message, please read <http://meltemyuva.com/around.php?ra4>

 

klangf...@gmx.net

-- next part --
An HTML attachment was scrubbed...
URL: 
<https://mail.music.vt.edu/mailman/private/sursound/attachments/20160222/6b051804/attachment.html>
___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.

Re: [Sursound] Different usages, different spaces, different decoders?

[Jörn Nettingsmeier]

On 02/22/2016 11:24 AM, 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?

I ask because, it seems to me that interactions between room
acoustics and speaker positioning are known to have significant
psychoacoustic (and aesthetic) effects. Informally, I've observed
ambisonics working better than it had any right to, in particularly
difficult rooms (big reflective empty shoebox, for example).

But in respect of particular speaker layouts, (as per the discussion
on avoiding too many speaker in the horizontal plane), it seems to me
that there could be non-trivial interactions, so that (for arguments'
sake) a particular room might benefit from 'this' speaker layout as
against 'that' speaker layout.

I would seem a monster task to test a wide variety of rooms each with
a wide variety of speaker layouts (and I haven't even mentioned the
possible variety of speaker dispersion characteristics!) - but in the
long run, it needs doing - and sufficient testing might reveal
'families' of layout-room acoustic relationships that can point to
underlying causal rules.

If it's been done, I'd like to read it, and if it hasn't - sounds
like I've just knocked together a precis proposal for a PhD project!


to me, the single most obnoxious effect is the phasiness. next is 
localisation precision, but a long way down. absolutely nobody cares 
about localisation accuracy, so optimising for minmum angular error 
seems undesirable to me (unless there is a very specific use case).


i've been thinking about modelling the interference patterns to minimize 
phasiness in a systematic way. haven't done that yet, but now that I 
learned how to work with the SFS toolkit, i will look at it.

after setting up many ambi rigs, these are my working hypotheses:

* don't be precise. measure to centimetres, but then add random delay 
errors in for subjectively nicer reproduction at low orders.
this is what needs to be tackled systematically. we need a rigorous 
technique to dither spatial aliasing optimally.
i guess we want the peaks and dips to be smeared out uniformly over a 
large area.


* reverberation is your friend. it smoothes away the phasiness. unless 
your content has subtle reverb which would be drowned in the room response.


* 3D rigs seem to localise worse but sound better for low orders, my 
guess is it's because of smoother interference patterns. their path 
length variation is different to that of horizontal speakers across the 
listening area, which might be helpful. that's why i tend to recommend 
3d rigs over higher-order horizontal-only ones, unless you're sure that 
all your content will be at maximum order. even then, some height is 
nice. at ICSA 2011, i heard a small IOSONO wfs rig being augmented 
rather haphazardly with just four small height speakers (which, to the 
best of my knowledge, were used "to taste" and not in any systematic 
way), and the improvement was absolutely striking, not for localisation, 
but for tone color and plausibility of space.


* i have a hunch that stacked rings, for all their wastefulness, seem to 
have very nice interference patterns. for example, the SPIRAL in 
huddersfield (triple octogon with zenith) is in a ridiculously dry room, 
but i was quite surprised about its first-order performance, especially 
since it has way to many speakers for that, in theory.


if somebody can suggest any measurements that are feasible in the field, 
i will gladly obtain them from any future rig that i get to set up. i 
guess room impulse responses would be the most important piece of the 
puzzle. maybe we should just sweep each speaker into a tetramic in the 
sweet spot as a start. with careful analysis, that should contain a lot 
of information about the speakers and the room. we get free-field 
response above a few hundred hertz, and below the schroeder frequency, 
we're in mode land anyways...


--
Jörn Nettingsmeier
Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487

Meister für Veranstaltungstechnik (Bühne/Studio)
Tonmeister VDT

http://stackingdwarves.net

___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.

[Sursound] Different usages, different spaces, different decoders?

[Peter Lennox]

 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?

I ask because, it seems to me that interactions between room acoustics and 
speaker positioning are known to have significant psychoacoustic (and 
aesthetic) effects. Informally, I've observed ambisonics working better than it 
had any right to, in particularly difficult rooms (big reflective empty 
shoebox, for example).

But in respect of particular speaker layouts, (as per the discussion on 
avoiding too many speaker in the horizontal plane), it seems to me that there 
could be non-trivial interactions, so that (for arguments' sake) a particular 
room might benefit from 'this' speaker layout as against 'that' speaker layout.

I would seem a monster task to test a wide variety of rooms each with a wide 
variety of speaker layouts (and I haven't even mentioned the possible variety 
of speaker dispersion characteristics!) - but in the long run, it needs doing - 
and sufficient testing might reveal 'families' of layout-room acoustic 
relationships that can point to underlying causal rules.

If it's been done, I'd like to read it, and if it hasn't - sounds like I've 
just knocked together a precis proposal for a PhD project!


Dr. Peter Lennox
Senior Fellow of the Higher Education Academy
Senior Lecturer in Perception
College of Arts
University of Derby

Tel: 01332 593155

The University of Derby has a published policy regarding email and reserves the 
right to monitor email traffic. If you believe this was sent to you in error, 
please select unsubscribe.

Unsubscribe and Security information contact:   info...@derby.ac.uk
For all FOI requests please contact:   f...@derby.ac.uk
All other Contacts are at http://www.derby.ac.uk/its/contacts/
___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.

Re: [Sursound] Wireless Solutions for Binaural Event

[Jörn Nettingsmeier]

On 02/21/2016 09:47 PM, Justin Bennett wrote:


The solution used in tunnels, caves, mines etc. is to use a
radiating cable instead of a normal antenna. This is a coax
cable that is designed to 'leak' part of the energy that
passes through it, usually by having some holes in the
shield (a standard coax won't work).


yes, that’s what I meant. There was for a long time a sound art piece
on the Afsluitdijk in the Netherlands by Moniek Toebosch that used
a leaky coax cable all along the dijk. Drivers could tune into the frequency
and listen to Angels.

very local and linear coverage!


thanks for pointing this out. i had heard about this technique before, 
but i was assuming that it works because the cable is like a line 
radiator and it's straight.
i'm no radio guy, so i'm applying acoustic principles here and may be 
totally wrong, but my reasoning is that at uhf, say 600 MHz, you end up 
with a wavelength of about half a meter. that means the distance between 
the leaks would have to be small compared to that. fine. should give you 
a uniform cylindrical field. but what if you follow a u-shaped or zig 
zag path because that's what the building is like, with a distance 
between the legs of the u that are a lot longer than the wavelength?
i would expect pretty fancy interference patters with loads of complete 
nulls all over the place. or is there some sort of near-field effect 
that makes the effect of parallel lengths of wire negligible?




--
Jörn Nettingsmeier
Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487

Meister für Veranstaltungstechnik (Bühne/Studio)
Tonmeister VDT

http://stackingdwarves.net

___
Sursound mailing list
Sursound@music.vt.edu
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit 
account or options, view archives and so on.