Acoustic Enclosures

An acoustic enclosure is a specially designed structure that significantly reduces noise from technical installations. The enclosure surrounds the noise source and combines sound-insulating and sound-absorbing materials to minimize noise nuisance without affecting the operation of the installation.

At ALARA, sound-insulating enclosures are fully custom-designed. Factors such as available space, ventilation, heat generation, maintenance access, and required noise reduction are taken into account. This results in a solution that not only provides optimal acoustic performance but also integrates perfectly with the technical installation.

An acoustic enclosure enclosure is suitable when a specific machine or installation is the primary source of noise. Instead of insulating an entire room, only the noise source is enclosed. This often makes an enclosure an efficient and cost-effective solution.

Enclosures are commonly used for:

• Generator sets
• Compressors
• Pumps
• HVAC installations
• Cooling installations
• Transformers
• Industrial production machinery

During a project, ALARA assesses which solution best suits the technical situation. In some cases, an enclosure is the right choice, while in others a combination of acoustic barriers, silencers, or ventilation systems may deliver better results.

Virtually any technical installation that produces noise can be fitted with an acoustic enclosure. ALARA develops solutions for a wide range of applications in industry, energy, data centers, maritime, and construction.

Common applications include:

• Emergency generators
• Diesel and gas generators
• Compressors
• Pump systems
• Combined heat and power systems
• Transformers
• Chillers
• Ventilation systems
• Hydraulic systems

Because every installation has different requirements regarding airflow, maintenance, and safety, every enclosure is designed specifically for the project.

The final noise reduction depends on several factors, including the installation’s noise level, the required standard, the environment, and the available space. In many situations, a well-designed enclosure can reduce noise levels by tens of decibels. Because even a difference of a few decibels is clearly noticeable to the human ear, a custom solution can make a significant difference for both the surrounding environment and employees. ALARA performs acoustic calculations in advance to determine the construction required to achieve the desired performance. This means the design is based on the client’s specific situation rather than on standard values.

Every noise source is different. For this reason, each project begins with an extensive analysis of the installation and its surroundings. The analysis considers factors including:

• The sound power level of the installation
• Dominant noise frequencies
• Airflows
• Heat generation
• Maintenance requirements
• Available space
• Local noise regulations
• Safety requirements

Based on this information, ALARA’s engineers develop a solution that provides optimal technical and acoustic performance.

Yes. In many cases, existing installations can be retrofitted with a custom sound enclosure. This is a commonly selected solution when installations no longer comply with changing noise regulations or when the surroundings of a site change.

ALARA assesses the existing situation and develops a solution that fits the available space and existing installation as closely as possible. As a result, replacing the entire installation is often unnecessary.

A common challenge in sound insulation is combining sufficient airflow with maximum noise reduction. Technical installations generate heat and require continuous airflow to operate reliably. ALARA therefore integrates specially designed ventilation systems, silencers, and air ducts into the enclosure. This keeps the installation properly cooled while minimizing noise emissions. This integrated approach prevents overheating and contributes to a longer service life for the installation.

Yes. A sound enclosure should never obstruct maintenance activities. For this reason, accessibility to all important components is carefully considered during the design process.

Depending on the application, the following can be integrated:

• Inspection hatches
• Maintenance doors
• Removable panels
• Sliding panels
• Large service doors
• Lifting provisions

This allows inspections and maintenance to be carried out safely and efficiently without dismantling the entire enclosure.

Yes. Many projects are located outdoors, for example at emergency power installations, power plants, or data centers. The enclosures can therefore be constructed using materials and coatings resistant to:

• Rain
• UV radiation
• Corrosion
• Temperature fluctuations
• Industrial environments
• Maritime conditions

The choice of materials is adapted to the specific environmental conditions of each location.

Yes. Applicable laws and regulations, project requirements, and environmental and safety requirements are taken into account during the design process.

Depending on the application, factors such as fire safety, ventilation, maintenance, structural safety, and noise regulations can be incorporated. By considering these requirements early in the design process, delays during implementation can be prevented.

No two installations are the same. Differences in power output, dimensions, airflows, maintenance requirements, and environment often make standard solutions less effective.

ALARA therefore develops exclusively custom solutions. This not only achieves the required noise reduction but also creates a solution that integrates optimally with the client’s operations.

This approach results in:

• Better acoustic performance
• More efficient ventilation
• Easier maintenance
• Longer service life
• Lower operating costs

Yes. ALARA manages projects from the initial analysis through to final handover. Clients have one point of contact throughout the entire process.

A turnkey project can include:

• Acoustic analysis
• Engineering
• 3D design
• Manufacturing
• Quality control
• Transport
• On-site assembly
• Commissioning
• Aftercare

Because all disciplines work closely together, the different components integrate optimally and the risk of failure costs is reduced.