Noise and Vibration Solutions for Yachts
DEICON has developed the following novel, highly effective, and yet affordable semi-active (adjustable passive) and active vibration control 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).
- Active acoustic filtering and active noise cancellation for lowering the low-frequency noise in the ducts and noise radiating from the duct openings. Examples include, but not limited to, HVAC ducts, engine air intake duct (to abate induction noise), and exhaust ducts (to silence the exhaust 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.
To mitigate the noise and vibration problems in yachts the following solutions have be used with various degrees of effectiveness:
* 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 (elastically mounting) 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 air conditioning and intake/exhaust ducts (for the engines).