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Acoustical foams are sound absorptive media that are designed to reduce reverberation/ amplification of airborne sound within an enclosed space, and/or, reflection of sound off otherwise hard surfaces. Depending upon the specific acoustical makeup of sound in a particular situation, acoustical foams are often faced with membranes and materials to ‘tune’ the foam to maximally absorb sound energy in specific sound frequency bands. We only stock Polyester foams that meet UL94-HF1 and which are self-extinguishing once a naked flame is removed. As all Polyurethane based foams have a high ‘smoke evolution’ in a fire situation, they are not recommended in areas where quick egress is not available. Acoustical Foams are also available in materials having better fire resistant characteristics (ie: Melamine). Micro-perforated ‘Millennium Metal’ may also be used to face metal panels to provide a fully fireproof (and weatherproof) sound absorptive surface.
Barrier materials block/reflect airborne sound due to their relatively high cross-sectional mass. The higher the mass, the greater the reduction of sound from one side of the ‘barrier’ to the other. Common materials such as concrete, sheetrock and wood make good barriers but they lack the flexibility required in many applications (ie: noise radiating off pipes and ductwork). It is these flexible barrier materials that we stock, most with a fire-resistant facing on one or both sides. They are Barium Impregnated Vinyls that are about 1/8” (3mm) thick and have a cross-sectional mass of 1#/sqft (4.88Kg/sqM). Some are reinforced with fiberglass cloth so that they can be hung as flexible ‘Acoustical Curtains’. Barriers should not be directly applied to sound generating surfaces. Doing so will reduce their effectiveness.
Composite materials combine both foams and barriers for applications where both sound absorption and blocking are required (ie: Engine Rooms) or where a thin layer (typically ¼”(6mm) ) of foam is required to ‘decouple’/separate a barrier from a surface that has some acoustical energy or a surface where one wants to reduce airborne acoustical energy energizing that surface. Barriers with a single foam decoupling layer are typically used for acoustical floor mats, ‘lagging’ ductwork, cabinets with vibrating or pulsating internal components (ie: heat pumps, control panels, fans and so on) or composited further with an outer (thicker) absorptive media.
Vibra-Sonic Control stocks a wide range of products to address the ever-evolving variety of applications.
Typically Stocked or readily available Absorptive Materials
- MC5200 – 1” thk fine celled Polyester foam.
- MC5200C- 2” thk convoluted fine cell Polyester foam
- FLC-14 – MC5200 with a cloth backed perforated vinyl facing.
- MC5259 – MC5200 with a Metalized Mylar film facing.
- MC5294 – MC5200 with a Urethane film facing.
- Melamine Foam – Open cell foam, manufactured from melamine resin, with high fire- resistant characteristics.
- Grey Turbo Facing – A lightweight, weatherproof, relatively acoustically ‘clear’ wrap material for absorptive and absorptive/barrier materials and composites. Ideal for washable, cleanable, acoustical ‘baffle’ and panel applications, particularly in industrial, food processing, outdoor, and ‘clean environment’ applications.
- Millennium Metal – Micro-perforated Metal Sound Absorbing panel facing
- Accessory Items; Spindle Anchors, 2” (50mm) and 3” (75mm) Metalized Mylar tape for MC5259 joints.
Typically Stocked Barrier Materials
- 10NL (CB16, Pipe Lag) – 1psf (4.88Kg/SqM) flexible Barium Impregnated Vinyl.
- 10NL-RP – As above but with 1 side faced with fire resistant, reinforced Metalized Polyester film.
- 10NL-RP2 – As above but both sides with the RP facing.
- 1000P – Same as 10NL but reinforced with polyester scrim for flexible ‘Acoustical Curtain’ applications.
Typically Stocked Acoustically Composited Products
- 0-10NL-25 – 10NL (see above) with a ¼” Polyester ‘decoupling’ layer, used for acoustical ‘lagging’ in a ‘single-product’ application where high and mid range sound frequencies are predominant.
- 0-10NL-25 –RP – As above but faced with the fire-resistant RP Polyester film.
- MC5155 – Same as 0-10NL-25 but with wear-resistant surface facing for low-traffic floor mat and equipment ‘Operator Cab’, side panel and ‘dog house’ barrier applications.
- MC5155DT – Similar construction to 0-10NL-25 but 10NL barrier is composited/sandwiched between a ‘wear resistant/carpet grain’ facing and decoupled using a closed cell neoprene below to reduce potential rusting of the equipment’s floor pan in floor mat applications.
- MC5259/1/25 – MC5259 (see ‘Acoustical Foams’ above) fused to 10NL (see ‘Barrier Materials above) and a ¼” of foam ‘decoupling’ layer. Typically used in Generator enclosure and Marine Engine Room applications where naturally aspirated diesel engines are involved.
- MC5259/2/25 – As above but a with 2 lb. 10NL
- MC5259/1/25 – PSA1 – Same as MC5259/1/25 but with a pressure sensitive adhesive backing.
- MC5294/1/25 – Same as MC5294/1/25 but with a Urethane film facing and used where engines are Turbo-Charged or other applications where a barrier and a mid to high frequency absorptive media are required. Also available with optional PSA1 adhesive backing.