What Is Sound Barrier, Main Function, And How It Works

Illustration of sound barrier. (pixabay)

YOGYAKARTA - In a modernity era with rapid transportation growth today, the noise from roads, railroads, and airports is certainly a big problem for the environment and the comfort of the general public. However, one of the effective solutions that can solve this problem is the use of sound barriers. However, what is sound barrier? Check out the full review below.

Quoted from Antara (19/08/2025), sound barriers are physical structures designed to reduce or block sound waves from spreading to certain areas, especially to sensitive settlements or areas such as schools and hospitals. In general, sound barriers are installed along railroads, toll roads, or industrial facilities that produce high noise.

This structure performs its function by blocking lanes directly between voice sources and listeners, and absorbing some of the sound energy so as not to bounce back. Thus, the level of noise that reaches the surrounding environment can be significantly reduced.

Of course it is also important to understand what the main functions of the sound barrier are. Below are some of the main functions of sound barrier:

Sound barriers can withstand horns, vehicle engines, and tire friction with asphalt. This tool is certainly very important to be installed in areas with heavy traffic.

Facilities such as schools, hospitals, and places of worship require a quiet atmosphere so that activities can take place optimally. Sound barrier serves to create this atmosphere.

With less noise, people living around the highway or railway lines can enjoy a calmer and more comfortable environment.

Property in quieter areas generally has a higher selling value than those in noisy areas.

Sound barriers are made in various forms and materials. Below are some types of sound barriers that are usually used:

This type is generally made of concrete, brick, or metal. The advantage of this type is high durability and effective sound reduction. However, the appearance seems less aesthetic.

This type is a combination of plants with sound damping structures, and has a dual function; reduce sound and beautify the landscape. This type is also environmentally friendly and can support the city's reforestation program.

This sound barrier is made of glass or acrylic, and is often used in urban areas so as not to block the scenery. Although aesthetics, this material is still designed to absorb and reflect sound well.

This type has a form in the form of a panel assembled with sound absorptive materials such as mineral wool or acoustic foam. Suitable for use in industrial areas or large-scale construction projects.

The sound barrier working principle is to block the direct path of sound waves from the source to the receiver. When the sound hits the barrier surface, part of the energy will be reflected, partially absorbed, and partly inundated. The sound barrier surface design can also affect its effectiveness. Waved or porous surfaces absorb more sound than flat and hard surfaces.

Not only depending on the material alone, the effectiveness of the sound barrier is also determined by several factors below:

In Indonesia, sound barriers can be found in several places, especially along toll roads and high-speed rail lines. You can find real examples on toll roads in the city of Jakarta and the Jakarta-Bandung high-speed rail project.

Demikianlah review tentang apa itu sound barrier dan fungsi utamanya. Semoga informasi ini bermanfaat! Kunjungi VOI.id untuk mendapatkan informasi menarik lainnya.