Exterior Grade faced quilted fiberglass absorbers are used to reduce reverberant noise on permanent outdoor applications.
Applications
Typical applications include enclosing HVAC equipment, dust collectors or similar machinery behind a manufacturing plant.
Sizing
All curtains are custom made with standard sizes of 48" x any desired length up to 50' with up to a 4" thickness. Custom curtain sizes and bound or unbound rolls are also available.
Easy Install
Modular panels are constructed with grommets across the top and bottom and are sewn with an exterior grade thread.
Acoustical Performance
Exterior QFA products can offer up to an NRC of .75.
Available Products in the QFA Line
QFA-EXT-1" S
- Reduce reverberant noise on permanent outdoor applications like HVAC equipment.
- NRC rating .65
- Temperature range: -40° to +180° F
- Weight: 0.35 lb psf
QFA-EXT-2" S
- Commonly installed over wood fencing or walls adjacent to a job site or noisy machinery.
- NRC rating .45
- Temperature range: -40° to +180° F
- Weight: 0.45 lb psf
- Moisture permeability: 0.5 perms
QFA-EXT-D-2"
- Offers the highest NRC rating and is the heaviest product in the line.
- NRC rating .75
- Temperature range: -40° to +180° F
- Weight: 0.50 lb psf
Decibel Examples
When trying to enclose a piece a machinery, most people will know they want it "quieter," but can't put into acoustical terms the end result (or decibel reduction) they want to achieve. With our audio examples, you can actually hear the decibel differences compared to static pink noise.
Pink Noise
An example of a randomized static pink noise. Pink noise uses deeper sounds and lower sound waves.
3 dB
Just perceptible. 3dB reduction has a 18% reduction in the perceived volume and yet is just barely perceptible to the human ear.
6 dB
Noticeable. 6dB reduction has a 34% reduction in the perceived volume and is very noticeable to the human ear.
10 dB
Double/Halving. 10dB reduction has a 50% reduction in the perceived volume and sounds half as loud to the human ear.
20 dB
Much more/less. 20dB reduction has a 75% reduction in the perceived volume and most noticeable to the human ear.