Design Solutions - Spring 2020 - 52

Microperforated Wood Materials
-- entered the market about 15 years
ago. They typically have veneered faces
with densely packed sub millimeter
holes (up to 30,000 per sf) which from
a few feet away are barely visible to the
eye. This is applied to an MDF core with
supplemental absorption behind the
panel. The absorption mechanism uses
a hybrid boundary layer and Helmholtz
principal. The sub-millimeter holes act as
escape ports for compressed boundary
layer air. When a sound wave compresses
the air against a microperforated surface,

52

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designsolutions spring 2020

the air pressure reaches a point where it's
easier for it to enter the perforations than
to continue compressing. This creates
viscus losses leading to absorption. The
material requires supplemental absorption
behind the panel. NRC range 0.8 - 0.90.
CURRENT VARIETY

The current state of the art in
acoustic wood materials is 'all-in-one'
microperforated wood requiring no
additional absorptive materials behind the
panels. The panel core is fully exposed to
the face holes. NRC range 0.8 - 0.9.

The architectural woodwork industry
is seeing a variety of these types of
products from manufacturers partnering
every day with design professionals,
woodwork companies, material
sciences and acoustic engineers to
develop and manufacture both visual
and acoustic wood solutions. These
innovations are elevating today's
possibilities to achieve our industry's
vision of world class design.



Design Solutions - Spring 2020

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