Noise barrier

A noise barrier is an exterior structure designed to protect inhabitants of sensitive land use areas from noise pollution. Noise barriers are the most effective method of mitigating roadway, railway, and industrial noise sources.
we provide the best solution with our long-lasting and durable products to sound insulation, strength, and road safety. Alfa's noise barriers can be placed on both sides at the one-way roads that keep the noise inside. For two-way roads, we provide the noise barrier which is used to the sides and middle of the road that keep the noise on their sides. So the noise doesn’t affect the vehicles on the other side of the road.

Noise barrier

Specifications

CHARECTERISTICSSPECIFICATION
Panel Sizes3960 x 500, 2960 x 500, 2460 x 500, 1960 x 500 mm
Panel Thickness80mm | 100 mm | 120 mm
Wind Load Designed as per IS 875 Part-III, 1987
Sound ProofingClass -A4
Sound DeadeningClass -B2
Type of Wall Double skin insulated wall
Facing SheetPlain metal sheet / GI sheet/Aluminium , 0.5 to 1.2 mm thick
Backside SheetPerforated sheet/ GI sheet/Aluminium with 22-46 % open area
Infill / Core Rock wool Confirming to IS-8183 & BS 476 of varies density and Thickness. Rock Wool covered with Fiber tissue paper fire-resistive.
CoverWater repellent tissue paper for infill material lamination,50-micron thickness
Sound Damping High density mass loaded vinyl barrier of 2 MM thickness
Joint Each panel having a tongue & groove to join perfectly with each other
Gasket The panel and structure having neoprene rubber gaskets at the joint to block noise leakage.
Vertical Post/ Structure The structure is of ‘H’ profile in which acoustic panel slides longitudinally.
Finish All metallic surface/parts are galvanized / powder coated / painted in desire shade.

Advantages

  • Fire Resistance
  • Less Maintenance Cost
  • Durable for all Weather Conditions
  • Easy Installation
  • High-quality noise reduction performance

Applications

  • Highways
  • Railways
  • Industrial areas
  • Airports

Typical Sound level calculations

SOUND OR NOISE EXAMPLE SOUND LEVEL COMMENTS
human ear0 dBThis is a matter of definition
Rustle of leaf20 dB
Whisper30 dB
Normal conversation60 dB
Inside passenger car at 60 MPH65-75 dBSmaller cars are usually noisier
Ringing telephone80 dBMeasured close to the phone
Hair dryer85-90 dBMeasured close to the dryer
Lawn mower85-90 dBMeasured at the ear
Maximum exposure, 8 hours890 dBOSHA regulation
Chain saw90-100 dBMeasured at ear, sound level varies by model
Tractor, bulldozer95-105 dBInside cab may be less noisy. Sound level varies by model
Rock drill110-115 dB
Circular saw, table saw110 dB
Threshold of pain120 dBA matter of definition
Pneumatic chipper120 dB
Fire engine siren120 dB
Jet engine at takeoff140 dB
12-gauge shotgun165 DBImpact sound uses a different risk criteria
Rocket launch180 dB
Loudest possible sound195 DB