We feel it is time for an innovative sound enclosure. Would you like to know why?


As a world leading consultancy firm in marine acoustics with over 30 years of experience we know that a good acoustic enclosure is one of the key parts of airborne noise reduction. To our knowledge many sound shields suffer from:

  • Improper closure of the individual panels.
    Gaps due to a minimum amount of fixation points in combination with the constant air-borne noise pressure on the panels create noise leaks and rattling panels. This results in performance loss in the overall air-borne noise reduction.
  • Noise leaks due to penetrations.
    Obviously, a sound shield needs several penetrations. All these penetrations are potential noise leaks. Proper seals will ensure a noise-tight penetration but need to be flexible as well. It is vital to use flexible seals to prevent contact noise from vibrating appendices like cables, pipework and most important; the exhaust.
  • Insufficiënt sound insulation
    Degrading insulation foam, loose slaps of insulation or no sound insulation material at all are common to many sound shields.
  • Improper fixation of the exhaust.
    Special attention is needed for the exhaust. The exhaust is an underrated source of both noise and vibration in sound enclosure design. Improper fixation of the exhaust will largely destroy the noise reduction of the sound enclosure.
  • Ventilation and combustion air inlet/outlet
    When focussing on details like penetrations, one should first tackle the air in- and outlets. Being large openings in an enclosure, they are the obvious noise leaks. We incorporate optimized labyrinth systems which in the future can be extended with state of the art technology.



Soon at the METS an optimized sound enclosure will be introduced. Find out what makes it so special.


  • Excellent closure of the individual panels.
    We have found the solution in a splash proof fitment, originating from the transport sector of high valued goods like artwork, satellites and GP motorcycles. This fitment ensures a closure around the full perimeter of the panels.
  • Panel construction material
    The selected panel construction material is a result of an extensive research program and years of experience within Van Cappellen Consultancy. A combination of a lightweight, ultra-stiff aluminium panel with additional fine-tuned damping has resulted in the perfect balance of air-borne and structure-borne noise reduction within the weight and structural constraints
  • Frameless design
    The combination of the selected stiff panels and the full closure system around the perimeter of these panels results in a complete frameless design. All that is required is an aluminium profile fixed to a flat surface, usually the base pan or subframe, on which the panels will be clamped. This makes retrofitting an enclosure easy much easier.
  • Accessibility; all panels removable
    Additional benefit from the frameless design is accessibility. All panels are removable without any tool; maintenance and problem solving for the enclosed machine made easy ! Flat pack transport of the sound enclosure and a convenient replacement of spare panels are an added bonus.


Next week this will displayed on the METS. We invite you to see the box in full.


Custom design

No machine or project is the same. We strive to go beyond the air-borne noise reduction of standard sound enclosures and incorporate any specific requirements from our customer. Being weight or size reduction, ultra-silent enclosure by using the latest technologies or fully non-combustible constructions, we like to be challenged!

Sound insulation

The enclosure is fitted with purposely selected sound absorption material, offering excellent sound absorption characteristics and increase the overall noise reduction whilst meeting the test criteria of some of the highest fire resistance testing standards including EN 13501-1 B-s1,d0.

Not limited to this selection, we can offer other sound insulation materials ranging from ultra-light to non-combustible, all chosen with acoustics, safety and durability in mind.

Consultancy beyond the enclosure (thinking out of the ‘box’)

A good acoustic enclosure is only part of the solution. Improper mount selection, rigid connections of appendices and dynamically weak supporting foundations can largely destroy the effect of any enclosure, no matter how good. Noise levels at large distances from the enclosed machine will not be reduced by the perfect sound shield.

We live acoustics and look forward to seeing you at the METS


   Download Productsheet