Hello, the only one was a magnetostrictive speaker, developed by Dr. Siegfried Klein:
https://data.epo.org/publication-server/rest/v1.0/publication-dates/19891018/patents/EP0337062NWA2/document.html Best, Christoph Moldrzyk Am 19.10.2012 um 18:00 schrieb sursound-requ...@music.vt.edu: > Send Sursound mailing list submissions to > sursound@music.vt.edu > > To subscribe or unsubscribe via the World Wide Web, visit > https://mail.music.vt.edu/mailman/listinfo/sursound > or, via email, send a message with subject or body 'help' to > sursound-requ...@music.vt.edu > > You can reach the person managing the list at > sursound-ow...@music.vt.edu > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Sursound digest..." > > > When replying, please remember to edit your Subject line to that of the > original message you are replying to, so it is more specific than "Re: > Contents of Sirsound-list digest..." so that it matches the post you are > replying to. > > Also, please EDIT the quoted post so that it is not the entire digest, but > just the post you are replying to. > > > Today's Topics: > > 1. LAC 2013: the Linux Audio Conference - Call for Participation > (Robin Gareus) > 2. Spherical speakers ? (Augustine Leudar) > 3. Re: Spherical speakers ? (Nils Peters) > 4. Re: Spherical speakers ? (Augustine Leudar) > 5. Re: Spherical speakers ? (Neil & Marcia Adams) > 6. Re: Spherical speakers ? (Augustine Leudar) > 7. Re: Spherical speakers ? (Neil & Marcia Adams) > 8. Re: Spherical speakers ? (Augustine Leudar) > 9. Re: Spherical speakers ? (Marc Lavall?e) > 10. Re: Spherical speakers ? (Fabio Kaiser) > 11. Re: Spherical speakers ? (Bo-Erik Sandholm) > 12. Re: Spherical speakers ? (Robert Greene) > 13. Re: Spherical speakers ? (Robert Greene) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 18 Oct 2012 19:41:16 +0200 > From: Robin Gareus <ro...@gareus.org> > Subject: [Sursound] LAC 2013: the Linux Audio Conference - Call for > Participation > To: Surround sound list <sursound@music.vt.edu>, > l2ork-...@disis.music.vt.edu > Message-ID: <50803f3c.3040...@gareus.org> > Content-Type: text/plain; charset=ISO-8859-1 > > sorry for >< please >> << > > We are happy to announce the next issue of the Linux Audio Conference > (LAC), May 9-12, 2013 @ IEM, the Institute of Electronic Music and > Acoustics, in Graz, Austria. > > The Linux Audio Conference is an international conference that brings > together musicians, sound artists, software developers and researchers, > working with Linux as an open, stable, professional platform for audio > and media research and music production. LAC includes paper sessions, > workshops, and a diverse program of electronic music. > > *Call for Papers, Workshops, Music and Installations* > > We invite submissions of papers addressing all areas of audio processing > and media creation based on Linux. Papers can focus on technical, > artistic and scientific issues and should target developers or users. In > our call for music, we are looking for works that have been produced or > composed entirely/mostly using Linux. > > The online submission of papers, workshops, music and installations is > now open at > http://lac.iem.at/ > > The Deadline for all submissions is February 4th, 2013 (23:59 HAST) > > You are invited to register for participation on our conference website. > There you will find up-to-date instructions, as well as important > information about dates, travel, lodging, and so on. > > This year's conference is hosted by IEM, Graz, in cooperation with local > artists and FLOSS enthusiasts. > The Institute of Electronic Music and Acoustics (IEM) at the University > of Music and Performing Arts Graz is considered Austria's leading > institution in computer music, acoustics and audio engineering and has > gained international reputation for its research on spatial audio and > its artistic production and research. > IEM has been embracing Linux audio as a production and research > environment since the mid-1990s, and has contributed to FLOSS/Linux > projects, amongst others by providing drivers for multichannel audio > interfaces and hosting the Pure Data community portal and mailing lists. > > http://iem.at/ > > We look forward to seeing you in Graz in May! > > Sincerely, > > The LAC 2013 Organizing Team > > > ------------------------------ > > Message: 2 > Date: Thu, 18 Oct 2012 20:49:52 +0100 > From: Augustine Leudar <augustineleu...@gmail.com> > Subject: [Sursound] Spherical speakers ? > To: sursound@music.vt.edu > Message-ID: > <CABx2jurWP=hsr7mwwcj1xyqxe9eo1wo4zqyww1etzzxfhco...@mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > Spherical speakers ? > Are there such things ? - I tried googling to no avail. I dont mean > something like this : > > http://www.instablogsimages.com/images/2007/08/13/eole-system_48.jpg > > I mean that instead of a cone there is a sphere, and able to emit sound in > all directions I'm guessing if it hasn't been done its because it presents > considerable technical difficulties - still ... > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <https://mail.music.vt.edu/mailman/private/sursound/attachments/20121018/b70ea96b/attachment.html> > > > ------------------------------ > > Message: 3 > Date: Thu, 18 Oct 2012 13:21:09 -0700 > From: Nils Peters <peters.n...@gmx.net> > Subject: Re: [Sursound] Spherical speakers ? > To: Surround Sound discussion group <sursound@music.vt.edu> > Message-ID: <508064b5.6040...@gmx.net> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > > http://cnmat.berkeley.edu/research/spherical_loudspeaker_array > also the IEM and ircam are working on those things > > On 12-10-18 12:49 PM, Augustine Leudar wrote: >> Spherical speakers ? >> Are there such things ? - I tried googling to no avail. I dont mean >> something like this : >> >> http://www.instablogsimages.com/images/2007/08/13/eole-system_48.jpg >> >> I mean that instead of a cone there is a sphere, and able to emit sound in >> all directions I'm guessing if it hasn't been done its because it presents >> considerable technical difficulties - still ... >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: >> <https://mail.music.vt.edu/mailman/private/sursound/attachments/20121018/b70ea96b/attachment.html> >> _______________________________________________ >> Sursound mailing list >> Sursound@music.vt.edu >> https://mail.music.vt.edu/mailman/listinfo/sursound >> > > > > ------------------------------ > > Message: 4 > Date: Thu, 18 Oct 2012 21:30:55 +0100 > From: Augustine Leudar <augustineleu...@gmail.com> > Subject: Re: [Sursound] Spherical speakers ? > To: Surround Sound discussion group <sursound@music.vt.edu> > Message-ID: > <cabx2jury+vwi6b4yrwqqujdyvxwcu3agxh4c0ner5g2r9v5...@mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > I did come across these sorts of things - not to be pedantic, but they're > not really spherical (though as good as I guess) but lots of little normal > speakers pointing in all directions. Would it not be possible - by means of > some sort of elastic material - to have just one spherical surface that > vibrated equally over its whole surface ? > > On 18 October 2012 21:21, Nils Peters <peters.n...@gmx.net> wrote: > >> >> http://cnmat.berkeley.edu/**research/spherical_**loudspeaker_array<http://cnmat.berkeley.edu/research/spherical_loudspeaker_array> >> also the IEM and ircam are working on those things >> >> >> On 12-10-18 12:49 PM, Augustine Leudar wrote: >> >>> Spherical speakers ? >>> Are there such things ? - I tried googling to no avail. I dont mean >>> something like this : >>> >>> http://www.instablogsimages.**com/images/2007/08/13/eole-**system_48.jpg<http://www.instablogsimages.com/images/2007/08/13/eole-system_48.jpg> >>> >>> I mean that instead of a cone there is a sphere, and able to emit sound in >>> all directions I'm guessing if it hasn't been done its because it presents >>> considerable technical difficulties - still ... >>> -------------- next part -------------- >>> An HTML attachment was scrubbed... >>> URL: <https://mail.music.vt.edu/**mailman/private/sursound/** >>> attachments/20121018/b70ea96b/**attachment.html<https://mail.music.vt.edu/mailman/private/sursound/attachments/20121018/b70ea96b/attachment.html> >>>> >>> ______________________________**_________________ >>> Sursound mailing list >>> Sursound@music.vt.edu >>> https://mail.music.vt.edu/**mailman/listinfo/sursound<https://mail.music.vt.edu/mailman/listinfo/sursound> >>> >>> >> ______________________________**_________________ >> Sursound mailing list >> Sursound@music.vt.edu >> https://mail.music.vt.edu/**mailman/listinfo/sursound<https://mail.music.vt.edu/mailman/listinfo/sursound> >> > > > > -- > 07580951119 > > augustine.leudar.com > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <https://mail.music.vt.edu/mailman/private/sursound/attachments/20121018/4c414c5c/attachment.html> > > > ------------------------------ > > Message: 5 > Date: Fri, 19 Oct 2012 09:56:10 +0800 > From: Neil & Marcia Adams <neilnmar...@gmail.com> > Subject: Re: [Sursound] Spherical speakers ? > To: Surround Sound discussion group <sursound@music.vt.edu> > Message-ID: <6.2.5.6.2.20121019095432.024b5...@gmail.com> > Content-Type: text/plain; charset="us-ascii" > > An HTML attachment was scrubbed... > URL: > <https://mail.music.vt.edu/mailman/private/sursound/attachments/20121019/1a358347/attachment.html> > > > ------------------------------ > > Message: 6 > Date: Fri, 19 Oct 2012 02:59:32 +0100 > From: Augustine Leudar <augustineleu...@gmail.com> > Subject: Re: [Sursound] Spherical speakers ? > To: Surround Sound discussion group <sursound@music.vt.edu> > Message-ID: > <CABx2jur66T+n4aUzoHLEbJUG_xyTkuhuOoHSb94SYF7nQx=b...@mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > Hi Neil and Marcia, > I couldn't open that link..... > > On 19 October 2012 02:56, Neil & Marcia Adams <neilnmar...@gmail.com> wrote: > >> An HTML attachment was scrubbed... >> URL: < >> https://mail.music.vt.edu/mailman/private/sursound/attachments/20121019/1a358347/attachment.html >>> >> _______________________________________________ >> Sursound mailing list >> Sursound@music.vt.edu >> https://mail.music.vt.edu/mailman/listinfo/sursound >> > > > > -- > 07580951119 > > augustine.leudar.com > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <https://mail.music.vt.edu/mailman/private/sursound/attachments/20121019/ee54a21b/attachment.html> > > > ------------------------------ > > Message: 7 > Date: Fri, 19 Oct 2012 10:19:55 +0800 > From: Neil & Marcia Adams <neilnmar...@gmail.com> > Subject: Re: [Sursound] Spherical speakers ? > To: Surround Sound discussion group <sursound@music.vt.edu> > Message-ID: <6.2.5.6.2.20121019101118.02526...@gmail.com> > Content-Type: text/plain; charset="us-ascii" > > An HTML attachment was scrubbed... > URL: > <https://mail.music.vt.edu/mailman/private/sursound/attachments/20121019/a99a2152/attachment.html> > > > ------------------------------ > > Message: 8 > Date: Fri, 19 Oct 2012 03:31:44 +0100 > From: Augustine Leudar <augustineleu...@gmail.com> > Subject: Re: [Sursound] Spherical speakers ? > To: Surround Sound discussion group <sursound@music.vt.edu> > Message-ID: > <cabx2jurhg8tmfcgaayuaxrf_z2696xaycs6zaujxq_edjuo...@mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > hmm - I get the following mesage : An HTML attachment was scrubbed... then > a broken link.... > > On 19 October 2012 03:19, Neil & Marcia Adams <neilnmar...@gmail.com> wrote: > >> An HTML attachment was scrubbed... >> URL: < >> https://mail.music.vt.edu/mailman/private/sursound/attachments/20121019/a99a2152/attachment.html >>> >> _______________________________________________ >> Sursound mailing list >> Sursound@music.vt.edu >> https://mail.music.vt.edu/mailman/listinfo/sursound >> > > > > -- > 07580951119 > > augustine.leudar.com > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <https://mail.music.vt.edu/mailman/private/sursound/attachments/20121019/bf952277/attachment.html> > > > ------------------------------ > > Message: 9 > Date: Fri, 19 Oct 2012 07:42:19 -0400 > From: Marc Lavall?e <m...@hacklava.net> > Subject: Re: [Sursound] Spherical speakers ? > To: sursound@music.vt.edu > Message-ID: <20121019074219.627352e7@telecino> > Content-Type: text/plain; charset=UTF-8 > > > Augustine, > Login to the mailman archive is required in order to access the link. > Here's what it says: > > ------- > The late Dick Campbell designed a dodecahedron loudspeaker. Close? > http://users.rcn.com/rhcamp/dodec45.pdf > NeilA > ------- > > Marc > > Augustine Leudar <augustineleu...@gmail.com> a ?crit : > >> Hi Neil and Marcia, >> I couldn't open that link..... >> >> On 19 October 2012 02:56, Neil & Marcia Adams <neilnmar...@gmail.com> >> wrote: >> >>> An HTML attachment was scrubbed... >>> URL: < >>> https://mail.music.vt.edu/mailman/private/sursound/attachments/20121019/1a358347/attachment.html >>>> >>> _______________________________________________ >>> Sursound mailing list >>> Sursound@music.vt.edu >>> https://mail.music.vt.edu/mailman/listinfo/sursound >>> >> >> >> > > > > ------------------------------ > > Message: 10 > Date: Fri, 19 Oct 2012 14:35:30 +0200 > From: Fabio Kaiser <fabio.kai...@student.tugraz.at> > Subject: Re: [Sursound] Spherical speakers ? > To: Surround Sound discussion group <sursound@music.vt.edu> > Message-ID: <be756491-a51d-43f2-bfe4-c13e565c8...@student.tugraz.at> > Content-Type: text/plain; charset=us-ascii > > Google for dodecahedron loudspeakers. There you'll find some results. These > kind of loudspeakers are used in room acoustic measurements. To goal is to > excite the room without directional preference. But mostly the single speaker > chassis cannot be driven independently. > > Nils already mentioned that in research there are some institutions > investigation on this. The goal is basically radiation synthesis or > beamforming. > Look here: > http://iaem.at/projekte/sphericalarrays/compact-spherical-loudspeaker-arrays/ > > best > > Fabio > > > Am 18.10.2012 um 21:49 schrieb Augustine Leudar: > >> Spherical speakers ? >> Are there such things ? - I tried googling to no avail. I dont mean >> something like this : >> >> http://www.instablogsimages.com/images/2007/08/13/eole-system_48.jpg >> >> I mean that instead of a cone there is a sphere, and able to emit sound in >> all directions I'm guessing if it hasn't been done its because it presents >> considerable technical difficulties - still ... >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: >> <https://mail.music.vt.edu/mailman/private/sursound/attachments/20121018/b70ea96b/attachment.html> >> _______________________________________________ >> Sursound mailing list >> Sursound@music.vt.edu >> https://mail.music.vt.edu/mailman/listinfo/sursound > > > > ------------------------------ > > Message: 11 > Date: Fri, 19 Oct 2012 12:48:02 +0000 > From: Bo-Erik Sandholm <bo-erik.sandh...@ericsson.com> > Subject: Re: [Sursound] Spherical speakers ? > To: Surround Sound discussion group <sursound@music.vt.edu> > Message-ID: > <b2df37ae32eff745a8ce67b36bad700b010...@esessmb201.ericsson.se> > Content-Type: text/plain; charset="us-ascii" > > I remember seeing a DIY panel loudspeaker where element was places in the > base of the loudspeaker, > The panels where expanding / shrinking the panel by pumping air through a > slit from the base. > The panels where placed over a rectangular frame, maybe a more balloon formed > frame can be constructed. > > Maybe you can use a half inflated balloon as "panel", in that case the > balloon should not need to be pressurized to keep its size. > > - Bo-Erik > > -----Original Message----- > From: sursound-boun...@music.vt.edu [mailto:sursound-boun...@music.vt.edu] On > Behalf Of Fabio Kaiser > Sent: den 19 oktober 2012 14:36 > To: Surround Sound discussion group > Subject: Re: [Sursound] Spherical speakers ? > > Google for dodecahedron loudspeakers. There you'll find some results. These > kind of loudspeakers are used in room acoustic measurements. To goal is to > excite the room without directional preference. But mostly the single speaker > chassis cannot be driven independently. > > Nils already mentioned that in research there are some institutions > investigation on this. The goal is basically radiation synthesis or > beamforming. > Look here: > http://iaem.at/projekte/sphericalarrays/compact-spherical-loudspeaker-arrays/ > > best > > Fabio > > > Am 18.10.2012 um 21:49 schrieb Augustine Leudar: > >> Spherical speakers ? >> Are there such things ? - I tried googling to no avail. I dont mean >> something like this : >> >> http://www.instablogsimages.com/images/2007/08/13/eole-system_48.jpg >> >> I mean that instead of a cone there is a sphere, and able to emit >> sound in all directions I'm guessing if it hasn't been done its >> because it presents considerable technical difficulties - still ... >> -------------- next part -------------- An HTML attachment was > > > > ------------------------------ > > Message: 12 > Date: Fri, 19 Oct 2012 07:39:33 -0700 (PDT) > From: Robert Greene <gre...@math.ucla.edu> > Subject: Re: [Sursound] Spherical speakers ? > To: Surround Sound discussion group <sursound@music.vt.edu> > Message-ID: <alpine.lnx.2.00.1210190737110.21...@walnut.math.ucla.edu> > Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed > > > There are true omni directional speakers, made by MBL , > quite expensive. These work by having a whole surface that > expands and contracts --a sort of lens shaped thing that is > pushed in and out by compression of the ends. Hard to > arrange--hence expensive. But they do have an essentially > spherical pattern. (Why anyone wants this is a more complicated > question!) > Robert > > There was also a defacto spherical > speaker(except at high frequencies) > > On Thu, 18 Oct 2012, Augustine Leudar wrote: > >> I did come across these sorts of things - not to be pedantic, but they're >> not really spherical (though as good as I guess) but lots of little normal >> speakers pointing in all directions. Would it not be possible - by means of >> some sort of elastic material - to have just one spherical surface that >> vibrated equally over its whole surface ? >> >> On 18 October 2012 21:21, Nils Peters <peters.n...@gmx.net> wrote: >> >>> >>> http://cnmat.berkeley.edu/**research/spherical_**loudspeaker_array<http://cnmat.berkeley.edu/research/spherical_loudspeaker_array> >>> also the IEM and ircam are working on those things >>> >>> >>> On 12-10-18 12:49 PM, Augustine Leudar wrote: >>> >>>> Spherical speakers ? >>>> Are there such things ? - I tried googling to no avail. I dont mean >>>> something like this : >>>> >>>> http://www.instablogsimages.**com/images/2007/08/13/eole-**system_48.jpg<http://www.instablogsimages.com/images/2007/08/13/eole-system_48.jpg> >>>> >>>> I mean that instead of a cone there is a sphere, and able to emit sound in >>>> all directions I'm guessing if it hasn't been done its because it presents >>>> considerable technical difficulties - still ... >>>> -------------- next part -------------- >>>> An HTML attachment was scrubbed... >>>> URL: <https://mail.music.vt.edu/**mailman/private/sursound/** >>>> attachments/20121018/b70ea96b/**attachment.html<https://mail.music.vt.edu/mailman/private/sursound/attachments/20121018/b70ea96b/attachment.html> >>>>> >>>> ______________________________**_________________ >>>> Sursound mailing list >>>> Sursound@music.vt.edu >>>> https://mail.music.vt.edu/**mailman/listinfo/sursound<https://mail.music.vt.edu/mailman/listinfo/sursound> >>>> >>>> >>> ______________________________**_________________ >>> Sursound mailing list >>> Sursound@music.vt.edu >>> https://mail.music.vt.edu/**mailman/listinfo/sursound<https://mail.music.vt.edu/mailman/listinfo/sursound> >>> >> >> >> >> -- >> 07580951119 >> >> augustine.leudar.com >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: >> <https://mail.music.vt.edu/mailman/private/sursound/attachments/20121018/4c414c5c/attachment.html> >> _______________________________________________ >> Sursound mailing list >> Sursound@music.vt.edu >> https://mail.music.vt.edu/mailman/listinfo/sursound >> > > > ------------------------------ > > Message: 13 > Date: Fri, 19 Oct 2012 07:41:28 -0700 (PDT) > From: Robert Greene <gre...@math.ucla.edu> > Subject: Re: [Sursound] Spherical speakers ? > To: Surround Sound discussion group <sursound@music.vt.edu> > Message-ID: <alpine.lnx.2.00.1210190740390.21...@walnut.math.ucla.edu> > Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed > > > Such a thing was offered for sale for consumers by DBX(as I recall) > a long time ago. I do not think it had much success--not > surprisingly since there is no real reason to want such a thing. > > Robert > > On Fri, 19 Oct 2012, Fabio Kaiser wrote: > >> Google for dodecahedron loudspeakers. There you'll find some results. These >> kind of loudspeakers are used in room acoustic measurements. To goal is to >> excite the room without directional preference. But mostly the single >> speaker chassis cannot be driven independently. >> >> Nils already mentioned that in research there are some institutions >> investigation on this. The goal is basically radiation synthesis or >> beamforming. >> Look here: >> http://iaem.at/projekte/sphericalarrays/compact-spherical-loudspeaker-arrays/ >> >> best >> >> Fabio >> >> >> Am 18.10.2012 um 21:49 schrieb Augustine Leudar: >> >>> Spherical speakers ? >>> Are there such things ? - I tried googling to no avail. I dont mean >>> something like this : >>> >>> http://www.instablogsimages.com/images/2007/08/13/eole-system_48.jpg >>> >>> I mean that instead of a cone there is a sphere, and able to emit sound in >>> all directions I'm guessing if it hasn't been done its because it presents >>> considerable technical difficulties - still ... >>> -------------- next part -------------- >>> An HTML attachment was scrubbed... >>> URL: >>> <https://mail.music.vt.edu/mailman/private/sursound/attachments/20121018/b70ea96b/attachment.html> >>> _______________________________________________ >>> Sursound mailing list >>> Sursound@music.vt.edu >>> https://mail.music.vt.edu/mailman/listinfo/sursound >> >> _______________________________________________ >> Sursound mailing list >> Sursound@music.vt.edu >> https://mail.music.vt.edu/mailman/listinfo/sursound >> > > > ------------------------------ > > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound > > > End of Sursound Digest, Vol 51, Issue 18 > **************************************** > _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
