We are at a chemical-pharmaceutical factory in Barcelona.

In November 2020, Bureau Veritas carried out a series of measurements in dwellings near the industrial plant to check if it complied with noise regulations. This assessment yields an unfavourable result in one of the points analysed during night-time hours.

As a result, in February 2021 they commissioned environmental consultants and advisors to carry out a study to characterise the main noise sources. The idea is to identify the noise sources that contribute most to non-compliance. The results indicate that the noisiest sources are the air outlets of the scrubbers, water pumps and cooling towers.

The first step was to install a large acoustic barrier using Acustimódul-80A panels and a structure adapted to the plant’s cooling towers. This barrier will be extended in the second phase with the incorporation of the rest of the corrective measures.

To control the sound emission of the scrubbers, SNC silencers are installed in their chimneys.

The noise generated by the air conditioning units is reduced by installing acoustic barriers with Acustimódul-80A panels. These are installed on top of the fans with an RS7C acoustic door to allow access for maintenance.

The sound emission of the AA-2P fan is corrected by the installation of SNA silencers at the inlet and outlet, with a sound-absorbing funnel adapted to each situation.

Once the installation of all the corrective measures was completed, we carried out an acoustic measurement to verify compliance with the applicable noise regulations. Verifying that the objective was achieved.

Noise control work in industry always follows a very similar pattern. Once the noise sources that generate the nuisance have been analysed, by means of an acoustic study, corrective measures are designed adapted to the specific situation of the sources and their particular geometric situation. After the installation of the acoustic treatments, the corresponding measures are taken to check compliance with noise regulations.

The work follows an economy of scale, treating the most annoying noise sources first, and treating the other less important sources according to their contribution to the level of exceedance of the standard.


Project: Acoustic treatments in industrial plant.
Ref: O02BC1500187, O02BC2200174
Sector: Industry.