ACC-U-SOUND · Barrel shaped diffuser
BSD is a molded diffuser family for wall or ceiling placement. Choose the radius orientation, nominal size, finish and mounting around the room’s acoustic design.
BSD product role
BSD uses a rigid molded-fiberglass barrel form intended to distribute sound within a room. The source also offers optional 2-inch fiberglass on the back side.
The radius may run on the short or long dimension. That orientation, the surface location and the relationship to adjacent absorptive treatment should be established by the project’s acoustic design—not chosen from appearance alone.
The diagram establishes geometry, not a diffusion coefficient. Confirm the selected size and orientation in the project record.
Configuration ledger
BSD wall and ceiling products use different mounting conditions. Keep geometry, optional backing and attachment tied to the intended location.
Published reference1/8-inch rigid molded fiberglass in a barrel configuration; optional 2-inch internal fiberglass is published for the back side.
Project decisionConfirm shell, optional backing and the acoustic role of the selected assembly.
Published referenceThe barrel radius may run on the short dimension or the long dimension.
Project decisionShow the selected orientation on drawings and elevations.
Published referenceNominal 24 × 24, 30 × 30, 36 × 36, 24 × 48, 36 × 48, 48 × 48, 36 × 60, 48 × 72 and 48 × 96 inches.
Project decisionConfirm current availability, orientation, module and wall layout.
Published referenceNominal 24 × 24, 30 × 30, 36 × 36, 24 × 48 and 48 × 48 inches.
Project decisionConfirm grid compatibility, orientation, support and access.
Published referenceWhite gel-coat with lemon-peel texture or woven 100% polyester fabric. Ceiling units have flat lay-in edges; wall units use slotted top brackets and a lower angle with hook-and-loop attachment.
Project decisionVerify current finish, edge, hardware and substrate detail.
Published product reference
Use the nominal modules to coordinate layout. Establish the required diffusion performance through the project acoustic criteria and current QTS evidence.
Open the BSD product PDF| Nominal module | Published placement |
|---|---|
| 24 × 24 inches | Wall + ceiling |
| 30 × 30 inches | Wall + ceiling |
| 36 × 36 inches | Wall + ceiling |
| 24 × 48 inches | Wall + ceiling |
| 48 × 48 inches | Wall + ceiling |
| 36 × 48 / 36 × 60 inches | Wall |
| 48 × 72 / 48 × 96 inches | Wall |
The source does not publish a diffusion or scattering coefficient. Optional fiberglass on the back changes the described assembly, so request current evidence for the exact configuration.
The published source describes an “ASTM-84 Tunnel Test” and reports flame spread below 25 / Class A or I. Request the current ASTM E84 report for the selected shell, finish and optional backing.
Application planning
The BSD source defines wall and ceiling placement but does not publish a list of room types. Use it only where the project’s acoustic strategy calls for diffusion.
Documents & coordination
The BSD PDF is a construction and size reference. Complete the project record with current performance, fire and mounting evidence required by the acoustic design.
Request current project documentsThe current BSD page and PDF publish construction and nominal sizes but no diffusion coefficient, scattering coefficient, NRC value or frequency-specific performance table. Do not invent one.
Record the selected construction, dimensions, finish and mounting together. Request current acoustic, fire and installation evidence that matches that assembly.
Confirm field dimensions, substrate or structure, penetrations, adjacent systems, installer scope and access requirements before fabrication or procurement.
BSD questions
Use the published information to frame product review, then verify the exact assembly and evidence with QTS.
BSD is published as a barrel shaped diffuser. The optional 2-inch fiberglass behind the shell adds an absorptive component, but the current source does not publish a coefficient for that assembly.
The source allows the radius on the short or long dimension. The project’s acoustic design should determine orientation and placement.
Not on the current public page or PDF. Request current supporting evidence when a coefficient or frequency range is required.
Ceiling units are published with flat edges for lay-in grid placement. Wall units use slotted upper brackets and a lower angle with hook-and-loop attachment.
Do not assume orientation from dimensions alone. Confirm the radius direction, panel orientation and current mounting detail with QTS.
Have a BSD condition to review?
Share the room geometry, consultant criteria, proposed locations, radius orientation, finish and support condition with QTS.
