Cruise and Ferries
Comfort and Silence is a must onboard the nowadays Cruise Vessels and Ferries. Silent Line has the knowhow – Experience and Capabilities offering GUARANTEED low noise and vibration levels in accordance with or even lower than Comfort Class 1.
Comprehensive Engineering:Silent Line Engineering Department, based on 35 years of experience in the field of noise and vibration control, offers Innovative Engineering based solutions and services such as:
- Vibration Control : Finite Element Analysis
- Noise Control : Statistical Energy Analysis (S.E.A)
- Propulsion related studies :
Innovative Solutions, in order to achieve Comfort and Silence, starts and the main sound sources such as main diesel engines, generator sets, propulsion propellers, exhaust systems and the ship structure.
Noise emitted by main diesel engines and generator sets (air- borne noise) to be reduced by means proper designed sound shields (canopies) as shown below.
The sound shields are double flexible mounted using high volume marine approved mounting systems (avoiding heavy weight sub-frames) achieving extremely low structure- borne noise levels at the ship structure (foundations)
Noise control related to exhaust systems is extremely important in order to achieve and meet Comfort and Silence on outer deck areas. This includes the latest technologies related to Soot and Nox reduction. This technology is integrated in state of the art Silencers (mufflers) as shown above.
“Commercial” fire approved floating floor systems are often used onboard Cruise Vessels and Ferries. This kind of flooring system is relative easy to install however the natural frequency of this kind of flooring system(s) is “too high” and ends up with various disadvantages.
Silent Line uses a different type of IMO approved floating floor system controlling the natural frequency and creating must higher damping | isolation values.
This is extremely important as the complete cabin surrounding are installed on top of the floating floor. Innovative Solutions achieving Comfort and Silence.
Achieving low noise levels at transit means that sound sources other than main machinery becomes dominant. One of these sound sources is air conditioning (HVAC). Silent Line, multiple Award winner for most quiet Yachts, has innovative engineering-based solutions to achieve noise levels below 30 dB(A) emitted by air conditioning (HVAC) systems.
This means however that we have to enter into an early stage of the project (Design Stage) as our solutions must be implemented (in mutual consultation with the Interior Designer) in the interior design.
Achieving noise levels in accordance with or even lower than comfort class 1 requires a “balance” between all sound sources | sound paths and room acoustics.
Another important topic related to noise control is cabin-to-cabin (acoustic privacy).
Silent Line is using in-house designed computer simulation models on room acoustics (reverberation time), this data along classification requirements is used to select the correct type of partition wall, ceiling panels and hull and bulkhead liners.