3 Ways How To Reduce structure-borne noise In Marine Vessels

Proper Marine sound proofing is key to meeting one of the stringent requirements for marine vessels: the International Maritime Organization noise level code.

The code aims to protect the crew from health consequences like hearing loss, improve comfort levels, and protect marine mammals and biodiversity.

For ships with at least 1,000 gross tonnages, the noise level (dB) for machinery spaces and control rooms should be 110 and 75 dB, respectively. For navigating bridges and chartrooms, it should be 65 dB. For accommodation spaces, it’s 60 to 75 dB.

Addressing Onboard Noise

Most of the ship noise emanates from the structures in the water vessel — mainly, the propulsion engines and the generators. When these are operated, they produce sound waves and vibrations that can disrupt comfort and productivity and impact health in the long run.

Other sources include auxiliary engines, turbochargers, pumps, compressors, pipes, and fans. Heating and air conditioning systems and exhaust systems also contribute to watercraft noise.

Apart from employing structural designs that produce fewer noise and vibrations, here are three ways to reduce structure-borne noise in your water vessels.

Acoustic insulation. Marine insulating coatings are available in today’s market to help reduce noise and vibrations. Similar to the usual acoustic panels — albeit significantly thinner and lighter — these coatings serve as a barrier that helps block off sounds coming from your ship’s structures.

Engine isolation mounts. The engine is one of the main sources of structure-borne noise in most watercraft. To help bring down the noise and vibrations they generate, you can install rubber-made mounts between the engine and its frame. The mounts will serve as an additional layer that can absorb excessive sounds from the engine when it’s running.

Specially made floor mats. In addition to acoustic coatings that can be applied on walls, ceilings, and floors, you can also invest in specially made non-slip mats in certain areas of your ship. In accommodation areas, also consider opting for floating floors (an installation technique where boards are interlocked, not glued down or nailed) to help reduce the transfer of sound waves.

The Many Benefits Of Marine Sound Proofing

When installing any acoustic insulation solution, seal gaps and cracks on the surface where the coating will be applied to ensure maximum performance. Your goal is not to have any space or path where sound can escape.

If applied properly, you can enjoy many more benefits from a top-class marine sound proofing product. One of which is boosting your vessel’s energy efficiency. These coatings also serve as a thermal barrier that can help maintain the ideal temperature levels for each area of your watercraft.

With reduced noise and vibration and sustained ideal temperature, your crew and passengers can be more comfortable and have a better onboard experience.

With acoustic and insulation coatings, you can also keep moisture at bay. You can prevent corrosive substances from damaging your structures and components. In the long run, you can save money on repairs and prolong their usable life.

Because these coatings are lightweight, you won’t have to worry about the weight limitations of water vessels.

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