Acoustic Light Hood for Recessed Fixtures
Captures and blocks the sound energy that travels through light fixtures.
A recessed light fixture is an opening in the ceiling plane. The Speech Guard Light Hood is an acoustic light hood that encloses the back of the fixture in the plenum, so speech cannot pass through the light into the space above and down into the next room. It installs over the existing fixture without removing the cross tee.
Send your room dimensions, plenum height, ceiling grid size, lighting fixture counts and return grille counts. We return a system layout and a quote at no charge.
Two models, and they do different jobs
Standard hood. Absorptive. NRC 1.00, STC 5.
Hood with 1 lb septum. Adds mass to block transmission. STC 26.
Where the job is speech privacy between rooms, specify the septum model. The standard hood absorbs sound inside the plenum but does not block it.
Sizes and specifications
- 24″ x 24″ (610 x 610 mm) and 24″ x 48″ (610 x 1220 mm)
- 1″ thick, 9″ high
- Core: 1″ thick rigid fiberglass
- Non-woven polyester rayon facing both sides, thermally molded
- 2′ x 2′ standard hood 5 lb, 2′ x 4′ standard hood 10 lb
- 2′ x 2′ hood with 1 lb barrier 13.5 lb, 2′ x 4′ hood with 1 lb barrier 24 lb
- Specification section CSI 09 51 13, Ceiling Accessory
Installation
- Installed above the light fixture in a suspended ceiling
- Mounting clips included
- Fits into the ceiling plenum without removing the cross tee
- Shipped in multiple pieces, with handling directions included
- Must not be used to support any material, including insulation. Where insulation is used it should not overlap onto installed hoods
Test data
Sound absorption. ASTM C423-09a and E795, NRC 1.00 on the standard hood. Riverbank Acoustical Laboratories, report RAL-A14-253, tested on a one inch 6 pcf fiberglass panel using Mounting E-400 with an airspace behind the specimen.
Sound transmission. ASTM E90-09. Standard hood STC 5. Hood with 1 lb septum STC 26, Riverbank Acoustical Laboratories report RAL-TL14-388.
Surface burning. A one inch fiberglass panel of the hood material returned a Flame Spread Index of 15 and a Smoke Developed Value of 5 to ASTM E84-05, against Class A thresholds of 25 and 450. SGS U.S. Testing Company, report 530217, January 30, 2006.
Codes. The Spirit Acoustics specification states compliance with the International Building Code, and with the National Electrical Code for installation of this system over lighting fixtures.
