SIM Engineering : Acoustics and Vibration Design Office

17 April 2026
Industry
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Acoustic imaging measurements on a hydrofisher

Optimizing the noise performance of civil engineering equipment

In the public works sector, heavy equipment such as hydro-milling machines generate high noise levels, which can affect operators, local residents and the environment. These machines, used for digging deep trenches in civil engineering or special foundations, have multiple sources of noise, often localized and complex in nature.

The acoustic challenge for construction machinery

Faced with these challenges, the use of an acoustic engineering firm enables us to carry out a targeted acoustic study, in order to accurately diagnose noise emissions, assess their compliance with current acoustic regulations, and identify levers for improvement.

Acoustic imaging: an advanced diagnostic technology

Acoustic imaging – or camera acoustics – is an innovative method of acoustic measurement. It enables real-time visualization of the spatial distribution of sound emissions generated by a machine in operation. This technology is based on the use of a microphone array (or acoustic antenna) coupled to a signal processing system, capable of producing high-resolution noise maps.
These maps reveal the most critical areas of noise emission, such as engines, transmissions, hydraulic systems or tool-material interaction. They thus provide a clear and objective representation of the hydro-milling machine’s acoustic signature.

Acoustic measurement campaign schedule

As part of this study, SIM Engineering’s acoustics department deployed a rigorous methodology to characterize the hydro-milling machine’s noise emissions:
The acoustic camera was positioned around the machine in operation, to cover all its faces and potentially noisy components. Simultaneous acquisition of acoustic images and sound pressure levels enabled visual and quantitative data to be cross-referenced for a complete diagnosis.
A frequency analysis was then carried out to distinguish the various noise components according to their origin – mechanical or aerodynamic. Finally, a cartographic report was drawn up to pinpoint critical areas and formulate targeted recommendations: improved sound insulation, mechanical modifications, local acoustic protection.

Results and benefits for noise control

This approach provides manufacturers with a reliable decision-making tool for optimizing the acoustic performance of their equipment. By precisely identifying the dominant sources of noise, it becomes possible to design tailor-made solutions to reduce noise pollution.
Acoustic imaging thus contributes to meeting the requirements of noise regulations on construction sites, reducing operators’ exposure to noise and limiting the impact on the sound environment. It is part of a continuous improvement approach, essential in the field of industrial acoustics.

Conclusion: Acoustic expertise for industrial performance

Thanks to its expertise in acoustic imaging and industrial equipment acoustics, SIM Engineering supports manufacturers and operators of construction machinery in controlling their noise emissions. This ability to mobilize advanced diagnostic tools, such as the acoustic camera, enhances the effectiveness of the corrective actions to be implemented.
For any acoustic study, acoustic measurement or machine acoustics consultancy requirement, it is essential to call on an expert acoustician with recognized experience in acoustics applied to construction sites and technical equipment. SIM Engineering offers services tailored to the constraints of each project.

 

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