Tech Briefs Magazine - October 2021 - 33a

DEMOCRATIZING SIMULATION
Server™ deployment
product, which enables
users to access and
run simulations on
their own. According
to Horyn, " The appbuilding
capability is
very convenient, as it
enables us to have more
people using simulation
at a reasonable cost. "
FIGURE 7        
each part of the modeled surfaces can
create turbulence and affect overall
sound quality. This granular perspective
revealed sources of distortion that the
team had not previously considered.
For example, fluid motion mapping
showed that a vent's location in the
enclosure had an unexpectedly large
impact on overall flow. This suggested
that the team should give more
attention to a vent's placement as well
as its shape. Simulation helped the team
uncover this new direction for further
research and refinement.
Before simulation, L-Acoustics engineers
would typically wait weeks before seeing
each physical model's test results. This
meant that a significant amount of time
could be spent modeling designs that,
ultimately, would not be used. Now, as
" The app-building
capability is very
convenient, as it
enables us to have
more people using
simulation at a
reasonable cost. "
- YOACHIM HORYN, L-ACOUSTICS
Horyn explains, " The simulation is used
by our development team to test its
ideas day to day, so we can predict the
efficiency of a new design before building
any prototypes. " Pene adds: " Now we can
build prototypes and be confident they
will work properly on the first try. "
» EMPOWERING MORE
ENGINEERS WITH SIMULATION
AT L-ACOUSTICS
Yves Pene's use of simulation for bass
reflex design brings teamwide benefits
beyond this one project. Part of the
Acoustics Research job is to make sure
that the tools they develop can then
be efficiently used by the development
team. The Application Builder in COMSOL
Multiphysics®
enables the team to build
specialized user interfaces from their
models, which can then be distributed
widely throughout the company. " We are
using the Application Builder more and
more, " says Horyn. " At the end of this
project, the Acoustical Engineering team
built a simple application based on Yves's
multiphysics model. Users must define
only the specific parameters they need for
their project, as other necessary values are
already in place. "
The application is distributed to other
team members through the COMSOL
» PRACTICE,
PRACTICE,
PRACTICE: THE
NEVER-ENDING
PURSUIT OF
PERFORMANCE
The best professional
sound system is heard,
not seen. However,
the sensation of being
enveloped by live music,
as if the listeners and
the performers are
one, can be achieved
through the efforts
of many unseen
people and their specialized tools -
from microphones and amps to signal
processors and loudspeakers that envelop
the audience with sound. The acoustical
engineers of L-Acoustics, like musicians,
know that a great performance is built
on perpetual practice; there is always
more that can be done. Yoachim Horyn
and Yves Pene, having implemented
simulation for the analysis of their designs,
are now using them to explore further
refinements: " Great things are coming. "
    
   
REFERENCE
1. Pene, Y. Horyn, and C. Combet, " Nonlinear
acoustic losses prediction in vented
loudspeaker using computational fluid
dynamic simulation " , Audio Engineering
Society, no. 10359, 2020.
COMSOL NEWS 33a
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Tech Briefs Magazine - October 2021

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