Surround sound on the top

[Hoerninger]

The Technische Universität Berlin will offer an ear candy on tuesday, 29th august, in Hörsaal H 104 at 19:30.

There will be a life broadcast of an organ concert transmitted from the Kölner Dom to the TU Berlin.

The audience (650 seats) will hear a holographic reproduction from about 2700 speakers (yes, two thousand ..) which are on a band around the listeners in ear height with some extra speakers in the front and at the ceiling.

The applied technique is the wave field synthesis (WFS) which performes a synthesis of wave fronts out of loudspeaker arrays. The localization of virtual sources in WFS does not depend on or change with the listener's position. The speakers will be fed by digital lines from 832 independent sources, which are generated in a cluster consisting of 16 computers. The transmission from Köln to Berlin is provided by a broadband internet connection.

The organizer announced that this technique offers not only an authentic reproduction of the Kölner Doms acoustics but also the real perception of depth for the different organs within the Kölner Dom.


(click the pictures)
____________
Peter

[Bob Womack]

The Technische Universität Berlin will offer an ear candy on tuesday, 29th august, in Hörsaal H 104 at 19:30.

There will be a life broadcast of an organ concert transmitted from the Kölner Dom to the TU Berlin.

The audience (650 seats) will hear a holographic reproduction from about 2700 speakers (yes, two thousand ..) which are on a band around the listeners in ear height with some extra speakers in the front and at the ceiling.

The applied technique is the wave field synthesis (WFS) which performes a synthesis of wave fronts out of loudspeaker arrays. The localization of virtual sources in WFS does not depend on or change with the listener's position. The speakers will be fed by digital lines from 832 independent sources, which are generated in a cluster consisting of 16 computers. The transmission from Köln to Berlin is provided by a broadband internet connection.

The organizer announced that this technique offers not only an authentic reproduction of the Kölner Doms acoustics but also the real perception of depth for the different organs within the Kölner Dom.


(click the pictures)
____________
Peter

Yeah, but how many spouses will allow THAT array in the living room?

Bob

[Andyoz]

Interesting,

I found this link which explains it well with videos.

http://www.syntheticwave.de/3D%20Wav...-Synthesis.htm

[syntheticwave]

Interesting,

I found this link which explains it well with videos.

http://www.syntheticwave.de/3D%20Wav...-Synthesis.htm

Hi Andyoz,

thanks for linking, its my website. Sorry for the bad english, we old east germans has only education in russian.

If any questions regarding the principle please post it.


Greetings from Germany

Helmut

[Hoerninger]

University of California at Santa Barbara, the AlloSphere

http://www.allosphere.ucsb.edu/ :
The AlloSphere is a unique, one-of-a-kind research instrument that can be described as a large, dynamically varying digital microscope connected to a super computer to examine N-dimensional data sets and mathematical equations. ...

The AlloSphere space consists of a 3-story cube that is treated with extensive sound absorption material making it one of the largest anechoic chambers in the world. Standing inside this chamber are two 5-meter-radius hemispheres constructed of perforated aluminum that are designed to be optically opaque and acoustically transparent.

http://www.allosphere.ucsb.edu/facil...php?lab=sphere :
The loudspeaker real-time sound synthesis cluster (around 500 individual speaker elements plus sub-woofers) is/will be suspended behind the aluminum screen resulting in 3-D audio.

http://www.independent.com/news/2008...er-allosphere/ :
...three stories high, 2,000 square feet, engineered by sonic wizards to be acoustically neutral, making the sound in this round chamber equally good at any wavelength, anechoic. Right now, 16 four-inch speakers surround us, though eventually there will be 512. The sphere has two curved screens, suspended like floating mists in the semi-gloom. Only one side is currently operational, but soon spectators will be completely bombarded by sounds and sights of physical phenomena projected front and rear via supercomputer.

http://www.create.ucsb.edu/%7Estp/Al...udioSlides.pdf (page 8), see below.

A bit more than 5.1 , Ambisonics as well .
____________
Peter

[syntheticwave]

...but if we include the reflective surfaces of the playback room in synthesis, only 1296 loudspeakers remain for 3d WFS. See
http://www.holophony.net/WFS-Holophony.htm