Sound and Communications - February 2008 Issue

The upper level, E-W, 1440-foot-long
train platforms presented an entirely
different acoustical environment. The
enclosed ceiling elevation of 48 feet,
basically a glass and metal structural
construction, and the aforementioned
4.6-second reverberation time, as well
as extended outdoor platforms, represented
a challenge. To be effective,
this presented the necessity for an
entirely different solution. Mapping
indicated that even the narrow, controlled-beam,
umbrella-shaped disper-
The new D6: the little D12. Dual channel amplifier with AES / EBU
digital inputs. Bye E-PAC. Buy D6.
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Acoustic Design
Ahnert (ADA)
Dr. (Professor) Ahnert and his colleagues
at Acoustic Design Ahnert
(ADA) are best known in North
America as the developers of the architectural-acoustic
modeling and
auralization program known as EASE.
That program is employed extensively
by designers and systems integrators
to predict the coverage and intelligibility
of sound systems accurately
within a given architectural space.
Dr. Ahnert founded his firm in November
1990, initially concentrating
its efforts on “traditional” architectural-acoustic
matters. Always striving
to perfect its efforts, the company began
exploring how improvements to
computer-assisted design concepts
could be employed to better predict
how electro-acoustic (loudspeakers)
would perform in real spaces.
As an outgrowth of ADA’s endeavors,
the company introduced the EASE
system worldwide and the concept
was adopted by designers and integrators.
It has become almost the de
facto process for predicting system
performance. The concept is distributed
in North America by Renkus-
Heinz.
ADA maintains a thriving practice in
the field of architectural-acoustics,
electro-acoustics and audiovisual
technologies, with satellite offices and
numerous clients in far-flung regions
of the world.
For more information, go to
www.ada-acousticdesign.de.
(continued on page 38)
February 2008 45