Soundproofing in housing
Acoustic engineering for soundproofing in Seville

Vibration monitoring

In addition, we have the best resources to reduce noise and vibrations caused by building installations: air conditioning, air conditioning, extraction systems, fans, transformation centers, generator sets, pump rooms, motors, etc.

Cabina de encapsulado acústico

Acoustic encapsulations

We design acoustic encapsulations especially to protect the environment, work environments or industrial environments.


Acoustic silencers

We design silencers, plenums and hoppers specifically prepared for each noise source.

What is noise and why is it important to control it?

At Prolisur we take noise very seriously, since prolonged exposure to noise sources can cause fatigue, irreversible hearing damage, sleep disturbances, stress or decreased performance at work.

Specifically, the World Health Organization (WHO) calculates that:

  • 1.1 billion young people around the world may be at risk of hearing loss due to harmful listening practices.
  • More than 43 million people between the ages of 12 and 35 suffer from disabling hearing loss due to different causes.
  • Of young people between 12 and 35 years of age in high- and middle-income countries:
    • Almost half of them use devices such as MP3 players and smartphones with sound levels that are harmful.
    • Over 40% of them frequent clubs, discos and bars where they are exposed to harmful noise levels.

How do the different types of noise propagate?

Before knowing the solutions that can be adopted to prevent the harmful consequences of noise, we must understand the way in which the different types of noise that exist are propagated.

Airborne noise propagation

Airborne noise is any noise that originates in the air and propagates through it. Examples of this noise are traffic, construction, conversations, radio, television, etc.

Impact sound propagation

Impact noise is caused by hitting a solid medium, often the ground, propagating through the structure. Examples of this noise are falling objects, footsteps, furniture dragging, etc.

Vibration propagation

It is a noise produced by the movement of some object attached directly to a solid medium and propagated through the structure. Examples of this noise are those coming from engines and machines such as pressure groups, elevators, etc.

There are other classifications of types of noise that can be established according to their duration or frequency content. When considering an acoustic insulation solution, it is very important to know the origin of the noise, since the materials and solutions will be different depending on the noise to be treated.

What can we do to control noise?

Common sense makes us consider that the interposition of any element between the source of the noise and the receiver of the same will reduce the perceived inconvenience, this being the objective of acoustic insulation.

A good design of the acoustic insulation measures to be adopted will prevent the noise generated in one room from being transmitted to the adjacent ones and the noise coming from the outside from being transmitted to the interior of our room. However, not all the materials used in the building can be considered as good acoustic insulators nor, of course, for all the types of noise indicated above.

To achieve this, the acoustics specialists at Prolisur will identify the type of noise, the geometric conditioning factors of both the space where it is produced and the receiver, as well as the level of attenuation that is intended to be obtained (on many occasions mere regulatory compliance) so that the The action to be carried out entails an adequate economic cost:

Airborne noise control

In the case of airborne noise, we will frequently act on the separation elements between the noise source and the receiver through multilayer solutions of specific materials, with adequate thicknesses and, above all, with a successful configuration.

Impact noise and vibration control

On the other hand, in the case of impact noise and vibrations, we will generally act on the origin of the noise and the separation elements.

What materials do we use?

Naturally, for each type of noise there are certain specific physical characteristics that the materials must meet so that their use contributes to noise reduction.

Airborne noise insulation materials

There are two important parameters in relation to airborne noise mitigation capacity, namely, density (appropriate values are considered from 600 Kg/m3) and porosity. This last characteristic is related to the acoustic absorption coefficient (α), which must have low values for the objective at hand.

Airborne noise insulation materials

Impact noise insulation materials

In this case, the main relevant parameters are the dynamic stiffness associated with the frequency range in which the material is effective in attenuating impact noise (values around 20 MN/m3 are appropriate), the thickness (the thicker the lower will be the resonance frequency of the system and predictably higher will be the impact noise attenuation) and the compressive strength.

Impact noise attenuation

Vibration noise insulating materials

Here, the dynamic stiffness and the loss factor are especially important, which is the ability of a material to dissipate mechanical energy (optimal values of the loss factor are around 0.3).

vibration noise

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