Acoustical Ceiling Panels

Acoustical ceiling panels (Fig. 52-3) or boards of treated wood fibers bonded with an inorganic cement binder are available in a range of sizes, from 31 by 61 cm (12 by 24 in.) to 122 by 305 cm (48 by 120 in.). Available thicknesses range from 25 to 76 mm (1-3 in.), and they come with a smooth or shredded finish. Acoustic ceiling panels are installed in ceiling suspension systems or nailed or glued to walls and structural ceilings. They receive NRC ratings from 0.40 to 0.70.

3Q- Acoustical ceiling panels have high structural b strength and are abuse resistant. They have an excellent flame-spread rating. Panels can be used across the full span of corridor ceilings, or as a long-span finish di-

Acoustical panels made of wood fibers in a cement binder can span lengths up to 3.66 meters (12').

Figure 52-3 Acoustical ceiling panels.

rectly attached to the ceiling. They are appropriate for wall finishes in school gyms and corridors. Although they are usually resistant to humidity, check high-humidity use with the manufacturer, especially for panels with reveal edges.

Acoustical lay-in panels are fabricated of steel or aluminum with textured and embossed facings to give a cloth-like appearance. With acoustical fiber fill, the panels offer sound absorption as high as 1.10 NRC and meet fire safety standards.

Acoustical ceiling backer is available in 61 cm (2 ft) square or 61 by 122 cm (2 by 4 ft) sizes. Ceiling backer can easily be placed on top of an existing ceiling tile system that is not providing enough sound attenuation. The barrier material is a reinforced aluminum and fiberglass construction.

Perforated steel or aluminum panels with finished edges provide both absorptive and reflective surfaces for environments where a variable reverberation time is desirable, such as music rooms, concert halls, performing arts centers, and restaurants. The units are 61 cm (24 in.) wide closed and hinge open to 122 cm (48 in.) wide for additional absorption.

Acoustic baffles are available in 51 mm (2 in.) fiberglass and a variety of standard heights and widths. These panels are designed to acoustically upgrade existing spaces such as cafeterias, auditoriums, pool areas, and anywhere where high ceilings and poor acoustics require more sound absorption. The facing of the baffles is stretched to provide a smooth surface free from wrinkles or other distortion.

Cloud panels are used when ceiling heights are too low for traditional baffle installations, and perform the same acoustical functions without sprinkler or lighting interference. A 25 or 51 mm (1 or 2 in.) fiberglass core acts as an absorber and is contained within an extruded aluminum frame. The panels are available up to 122 cm (48 in.) square, and are finished with fabric.

Perforated galvanized steel or aluminum panels that can be individually attached to ceilings or walls offer an economical sound absorbing and fire-resistant approach to acoustic control. The panels are hung on metal brackets and backed with high performance acoustical fill. Panels can be cleaned in place without removing the acoustic fill. Optional protective plastic or fiberglass wraps are available. Perforated metal panels are appropriate for gymnasiums, swimming pools, weight rooms, and similar facilities, and can be used in auditoriums, theaters, libraries, and food service operations where noise is a problem and cost is an issue. They are also appropriate for industrial applications.

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