DEICON has developed the following novel, highly effective, and yet affordable semi-active (adjustable passive) and active vibration and noise control products/techniques for vibration and noise mitigation onboard luxury vessels: Computer Controlled Air Isolation System, arguably the most effective broadband vibration isolation technology: This system addresses the noise and vibration problem at the source, rather than where the problem is manifested. It uses a varying mixture of air and water to isolate the vibrating source, e.g., gensets and HVAC equipment, from the hull. Tuned Vibration Absorbers (PDF), for single frequency machinery isolation: A very cost-effective solution to such problem; does not require any modification on the existing mounts and does not disrupt the operation of the vibrating machinery. Active boom noise damping system to control the very low-frequency boom and rumble in cabins (PDF): This unpleasant and tiring noise is caused by the unfortunate coupling of cabins’ low frequency acoustic modes with the vibration of machinery running at a constant speed, most notably gensets. The same technology will be used to damp the low frequency coloration of sound in listening rooms/home theaters (cinemas). An active acoustic filter for lowering the low-frequency noise radiating from the HVAC openings into cabins: This patent pending technology is currently in the product development stage.		Noise and vibration levels in the owner's quarters (suite, office, etc.) which are frequently located not too far from the engine room, are expected not to be too different from those encountered in a house. To mitigate the noise and vibration problem the following issues are addressed, to various degrees of effectiveness, in yachts: The air-borne noise is abated by soundproofing the engine room and acoustically enclosing the noisy equipments around the vessel. This is done by proper use of sound absorbing material and sound barriers. The structure-borne noise and vibration are controlled by isolating the engines and other vibrating pieces of equipment, including the HVAC and exhaust ducts from the boat structure. The flow induced noise and vibration are lowered by reducing the flow speed in, and acoustic lining of, the HVAC and exhaust ducts. Although effective at mid and high-frequencies, these treatments, like most passive acoustic treatments,do not mitigate low-frequency duct noise.

In addition to the products mentioned above, DEICON provides design, computer analysis, testing/measurements, and prototyping services in other areas of noise and vibration abatement in luxury watercrafts and other marine applications.

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Computer Controlled Air Isolation System | Tuned Vibration Absorbers (PDF)
Active tuned acoustic damper | Active Boom Noise Damping system for Cabins (PDF)
Sound and Vibration Control | Vibration Isolation (Mounting)