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Outdoor Noise Barriers- Outdoor Sound
Curtains –
Case Study
©2003-2008 Unger Technologies, Inc. All Rights Reserved.
Unger Technologies received a frantic call from an upscale restaurant in a
large metropolitan area. City officials had visited their establishment
several times and issued them a citation for breaking the city’s noise
ordinance. The problem began with purchase of a new cooling condenser in
the restaurant’s recent expansion. The new condenser is located in the
back alley that faces residential apartments and houses. The condenser
is surrounded by brick /concrete block walls on three sides with the
open side facing the neighbors that filed the complaint.
Unger Technologies visited the facility and recorded sound level
readings and physical measurements of the area. The client’s main
concern was to reduce the noise levels fast before the city started
levying heavy fines. Other concerns in solution design were airflow to
the costly condenser unit, accessibility for maintenance of the unit,
because of limited space, accessibility for restaurant deliveries,
durability of the product to be installed, and of course low cost.
Unger Technologies addressed each of the customers concerns with an
outdoor sound curtain barrier wall. The outdoor sound curtains panels
are 54” wide and cut to length per the application. They have mating
exterior grade velcro on the vertical seams of each panel that are
joined together to form each wall. Grommets are installed across the top
and bottom of each panel used for suspension. The panels are constructed
of a 1lb. per square foot reinforced vinyl sound barrier bonded to a
nominally 1 inch thick acoustical absorber faced with a silicone
impregnated weather proof cloth. The composite sound curtain material
has superior UV and heat resistance.
We worked with the condenser manufacturer in the barrier design to
insure adequate air flow to the equipment and decided on a three sided
enclosure. On two sides, the outdoor sound curtains attached directly to
the frame with supplied clips through the curtains included grommets. On
the third side the curtain panels were hung on a double track, hook and
trolley suspension system. The double track allows the sound curtain
panels to slide behind one another for maintenance and accessibility.
Unger Technologies expedited the manufacture of the curtains and the
solution was installed in three weeks. The restaurant was pleased with
the noise reduction and the neighbors and the city both concur.
©2003-2008 Unger Technologies, Inc. All Rights Reserved. |
