Noise barrier

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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. Alpha'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.

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Specifications

CHARECTERISTICS	SPECIFICATION
Panel Sizes	3960 x 500, 2960 x 500, 2460 x 500, 1960 x 500 mm
Panel Thickness	80mm \| 100 mm \| 120 mm
Wind Load	Designed as per IS 875 Part-III, 1987
Sound Proofing	Class -A4
Sound Deadening	Class -B2
Type of Wall	Double skin insulated wall
Facing Sheet	Plain metal sheet / GI sheet/Aluminium , 0.5 to 1.2 mm thick
Backside Sheet	Perforated 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.
Cover	Water 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 ear	0 dB	This is a matter of definition
Rustle of leaf	20 dB
Whisper	30 dB
Normal conversation	60 dB
Inside passenger car at 60 MPH	65-75 dB	Smaller cars are usually noisier
Ringing telephone	80 dB	Measured close to the phone
Hair dryer	85-90 dB	Measured close to the dryer
Lawn mower	85-90 dB	Measured at the ear
Maximum exposure, 8 hours	890 dB	OSHA regulation
Chain saw	90-100 dB	Measured at ear, sound level varies by model
Tractor, bulldozer	95-105 dB	Inside cab may be less noisy. Sound level varies by model
Rock drill	110-115 dB
Circular saw, table saw	110 dB
Threshold of pain	120 dB	A matter of definition
Pneumatic chipper	120 dB
Fire engine siren	120 dB
Jet engine at takeoff	140 dB
12-gauge shotgun	165 DB	Impact sound uses a different risk criteria
Rocket launch	180 dB
Loudest possible sound	195 DB