Noise Barrier Protects People From Noise

Perforated metal noise barrier, also known as sound barriers, is an effective and economical solution to reduce noises. It is strong, durable and easy to construct because of its lightweight, therefore ,it is the most commonly used noise barrier type.

The panel of the open sound barrier, the first layer is the punching plate, the second layer is foamed aluminum, and the third layer is the metal plate.

Structure of the sound barrier

The sound barrier has three-layer structure.

Outside perforated metal
The first layer is mostly small hole or louver hole perforated screen. Material can be aluminum, stainless steel, mild steel and galvanized steel panels. The surface can be powder coated with various colors.
Middle sound absorbing material
The middle layer is porous structural sound absorbing material like glass wool and foamed aluminum, which has excellent sound absorption.
Outside metal sheet
The other outside layer is a flat and smooth metal sheet without any holes.
Working Principle
Schematic diagram of sound insulation principle of sound barrier.

The sound insulation principle of the noise barrier

When the noise from source hits the noise barrier, the sound waves will be separated into three ways:

  • One way is reflected back by the sound barriers.
  • Another way is spreading to the receiving point after being absorbed and weakened by sound barriers.
  • Some noises may bypass over the top of sound barrier, but it will get weakened due to the long path.

Finally, the overall noise intensity is weakened and controlled.

Noise Barrier Specifications
  • Material
    Stainless steel, aluminum, galvanized sheet and low carbon steel.
  • Metal sheet thickness
    0.6 mm, 0.7 mm, 0.8 mm and 1.0 mm.
  • Barrier forming thickness
    80 mm, 100 mm, etc.
  • Length
    1960 mm, 2460 mm or customized length.
  • Width
    Usually 500 mm or customized width.
Sound Barrier Types
  • Sort by the hole patterns
  • Sort by the surface
  • Sort by screen shapes
  • Sort by the hole patterns
    The surface is a round micro-hole perforated metal for noise barrier panel.
    Round micro-hole noise barrier
    The first layer is round micro-hole perforated metal sheet. It is lightweight, economical with simple process and beautiful appearance.
    The surface is a louver perforated metal for noise barrier panel.
    Louver hole noise barrier
    The first layer is louver perforated metal sheet. It is waterproof and dustproof, easy to clean and maintain. And the drainage part can protect the barrier against water accumulation inside.
  • Sort by the surface
    The surface is a flat noise barrier panel.
    Flat noise barrier
    The surface of the panel is flat.
    The surface is a concave-convex noise barrier panel.
    Concave-convex noise barrier
    The surface of the panel is undulating.
    The surface is a raised triangular cone noise barrier.
    Triangular cone noise barrier
    The surface of the panel has triangular convex.
  • Sort by screen shapes
    The gray upright round micro-hole perforated metal noise barrier. Its surface is flat.
    Standard flat barrier
    Flat and upright sound barrier wall.
    The green louver perforated metal on both sides of the road.
    Arc-shaped barrier
    Curved metal sound proof wall.
    The green louver perforated metal noise barrier next to the road. Its top is curved.
    Top cambered barrier
    The main part is flat and upright and the top is curved.
    The blue, yellow and green top outside the house is the folded louver perforated metal noise barrier.
    Top bend barrier
    The main part is flat and upright, and the top is bend.
    The noise barrier on both sides of the road is consist of the transparent acrylic panel and the green louver perforated metal panel.
    Composite noise barrier
    The barrier has both perforated metal panel and acrylic panel.
Noise Barrier Installation
Several people are installing the sound barrier panel into the column gap.

The installation of noise barrier

Sound barrier installation is relatively simple, but each step must comply with the rules.

Prepare: Noise barrier panels, H posts and bolts and nuts.


  1. Check the concrete foundation and concrete strength, ensure the reserved bolts and nuts meet the requirements, and correct bolt spacing.
  2. Clean the base surface, calibrate the bolts and nuts.
  3. Install the H posts, tighten the nuts and measure the posts’ verticality.
  4. Fix the posts, concreting at the joint, and smooth the surface.
  5. Install the barrier panels, insert the panels into the mounting groove of the H post, then fix them.
  6. Recheck after installation and correct immediately if there is any problem.
Sound Barrier Applications
  • Highway.
  • Subway.
  • Railway.
  • Airport.
  • Factory.
  • Construction site.
  • Residences.
White noise barrier next to the road.

Sound barrier next to the road

Gray noise barrier next to the railway.

Noise barrier next to the railway

Galvanized perforated metals are installed in the chemical plant.

Noise barrier in the factory

The silver noise barrier on the roof of the building.

Noise barrier on the roof of the building