Specialty Fabrics Review January 2020 - 39

a severe problem with unmitigated sound
reflections, the echo and reverberation in
the space resulted in some very unhappy
rental clients. "No amount of sound-system
electronic tweaking could help guests hear
the beautifully spoken comments of the
father of the bride," says John Calder, media
producer at Acoustical Surfaces Inc., Chaska,
Minn. "We designed large stone-columnlike sound diffusers with internal sound
absorption that would break up and reduce
the 'echoey' sound-lens effect of the beautiful
room's high oval shape."
However, one of the keys to the
client accepting the final design was that
the covering fabric color-matched the
limestone walls that had helped place the
facility on the National Register of Historic
Places. "As it turned out, nearly no one

noticed that more than a dozen 4-footwide by 12-foot-high diffusers had been
added to the walls, due to the accuracy
of the fabric match," Calder says.
BARRIER MATERIALS
Barrier materials fall under the soundproofing category as opposed to sound
absorptive. "Sound proofing is more about
sound blocking or lessening the noise
coming into a space," Hudson says.
"When using fabrics as a barrier
material, we are looking for a fabric that
is not porous or is minimally porous,"
Doria says. "There are a few products in
the marketplace promoting their use as
sound barriers, and they will report Sound
Transmission Class (STC) [an integer
rating of how well a building partition

In some performance
spaces, fabrics are a
key part of 'adjustable
acoustics' systems that
may be extended
or retracted to vary
reverberation in
a room.
DAMIAN DORIA

STAGE CONSULTANTS

phifer.com

www.SpecialtyFabricsReview.com 39



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Specialty Fabrics Review January 2020

Table of Contents for the Digital Edition of Specialty Fabrics Review January 2020

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