How Does Noise Barrier Work

How Does

Noise Barrier Work

How Does Noise Barrier Work

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  • How does sound work? (In a simple manner)

    When you hear a sound, you are actually hearing energy making a journey. Sound needs a medium to travel through, such as air, or water, which is why outer space is silent – there is no medium for sound to travel through.

    A noise barrier is a specially manufactured medium, to halt, or hinder the path that sound needs to travel through the air to reach your ears.

    Like how a wave moves on the surface of the sea, sound it creates lots of forward clumping movement as it travels through the air or a medium. In scientific terms, this phenomenon is called a ‘transverse wave‘.

    As sound travels through the air, by creating a lot of movement at the front and back of each transverse wave, it clumps the air at one part (compression) and expands (rarefaction) on other parts to create sound as you sense it with your hearing.

    A noise barrier then slows down and reflects this sound away by creating a barrier in the air between the source of the sound and a listener.

  • How does sound travel through walls?

    As we already know, sound travels by compression and rarefaction of air particles. As complicated as it may sound, every kind of material, large or small, dense or light – contains air pockets. The difference is, how much air pockets does each material contain?

    When sound travels from the outdoors into walls, the air pockets within the wall will allow the transfer of sound energy outside the wall’s through it; and in turn, transfer its sound energy to the air particles found on the other side of the wall.

    Though energy is lost while from transition, that is how we are able to hear sounds coming from the opposite side of a wall.

    While this happens, some sound energy hitting the wall will also be reflected across the surface, creating an echo.

  • Absorptive Noise Barrier

    Noise barriers, manufactured and supplied to projects by Mega Karya Sampurna, which meet all current standards, are able to minimize the noise affecting surrounding area (residential areas, hospitals, schools, industrial parks, etc.) and ensure a fine landscape. The noise barriers are windproof and aid to driver's concentration which could increase safety for people and other vehicles.

    Absorptive noise barrier wall:

    • Using sound-absorbing materials, punch plates, etc., which prevent sound reflection.
    • Sound absorption standard rating: Noise Reduction Coefficient – NRC describes the average sound absorption performance of noise barrier.
    • For the absorptive noise barrier, the NRC will be within 0.6 to 0.9 range (FHWA highway noise barrier design handbook).

  • How does our Noise Barrier work?

    Noise barrier systems around the world come in different materials.

    To understand how a noise barrier works, we need to understand the materials they are made of.

    Some materials are more popular than others due to effectiveness and/or cost. Other factors such as durability or availability of materials can be a deciding factor for the usage in noise barrier products.

    The simplified illustration above explains how an insulation medium helps in ‘cutting’ down sound.

    This concept is similar when we include a medium or a wall between the noise source and its receiver.

    PNCB(Permanent Noise Control Barrier)

  • Why are our Noise Control Barriers different?

    Our Noise Barriers are scientifically developed and rigorously tested after the manufacturing process to ensure quality standards set by the NEA on noise pollution limits in Singapore.

    Our noise barrier materials are selected via careful calculations through R&D and field performance to balance effectiveness and cost savings in our Noise Control Barriers – The Temporary Noise Control Barrier (TNCB) and Permanent Noise Control Barrier(PNCB).

    Through our R&D, our Noise Barrier models are considered the gold standard for current noise barrier systems in industrial use.

    To top it off, we offer a unique 2-sided powder coatings on our noise barriers to enhance durability and efficacy – something rarely found in other manufacturer’s products.

  • Reflective Noise Barrier

    Noise barriers, manufactured and supplied to projects by Mega Karya Sampurna, which meet all current standards, are able to minimize the noise affecting surrounding area (residential areas, hospitals, schools, industrial parks, etc.) and ensure a fine landscape. The noise barriers are windproof and aid to driver's concentration which could increase safety for people and other vehicles.

    Absorptive noise barrier wall:

    • Using the good noise insulation materials like Polycarbonate panels (PC), Poly methyl methacrylate panels (PMMA), Glass laminate.
    • Sound reflective Standards: Transmission loss coefficient – TL will measure the amount of sound energy hitting on or transmitted through the barrier.
    • For the reflective noise barrier wall, the TL coefficient is >25 dB at 500HZ and >30 dB at 1000HZ (refer to KS F4770 standard).