Vulkan auscultates and supports – What does COMFORT means?

Without an appropriate adjective, the word COMFORT has no precise meaning, it is generic

On board, as in other living environment where human beings focus on their psychophysical wellness, the achievement of a certain environmental COMFORT is planned since the beginning, being the designers’, the shipyard’s, the operators’, the maintenance technicians’ responsibility during the engineering, construction, and management phases of COMFORT itself.

An environment is COMFORTABLE when that condition of well-being felt by people’s senses is experienced in relation to the levels of:

  • Temperature/Humidity (thermo-hygrometric wellness).
  • Brightness (lighting wellness).
  • Noise and vibrations (vibro-acoustic wellness).

detectable in that same environment.

To complicate things even more, subjective variables must be added to environmental variables.

If designers, engineers, thermal and lighting architects deal with the first two, providing guests with tools to modify the environmental variables in relation to their subjective perceptions (HVAC and lighting systems), the vibro-acoustic COMFORT evaluation criteria refer to levels of tolerable noise and vibrations, acceptable maximum vibration and noise thresholds leading to people disCOMFORT.

To ensure COMFORT on board, there is no magic product able to eliminate the problem: a deep vibrational phenomena knowledge is required, an in-depth project conditions study, skills and complex analysis to build an on-board system, which is the combination of more components with specific features (resilient mounts, flexible couplings, tail shaft couplings, specific material with defined characteristic the structures have to be made of, ..) that collaborate together, to achieve the desired architecture result.

As far as it concerns vibro-acoustic topic, the yacht can be defined COMFORTable when it allows the guests to enjoy all the offered services, without unpleasant noises or vibrations that can affect the experience.It is crucial for some owners to be able to enjoy all the features of a super-performing, fast, perhaps noisy vessel, for the most of them, it is essential to fully feel the sea, enjoying sailing, taking advantage of all the relaxing areas, having the choice both to have a peaceful lunch either to have fun with friends drinking a cocktail.

Photo © Jean-Marie LIOT / Dufour Yachts

What is noise, then?
Noise is the sensation ears transmit to the brain, caused by changes in air pressure. Noise is several pure sounds sum. Each noise is characterized by a frequency and an amplitude. The greater the amplitude, the greater the intensity of perceived noise. Frequency, on the other hand, gives rise to heavy or high-pitched noises. The latter are the most bothering.

Noise propagates in the air and in different materials at different speeds as well.

Noise transmission generally occurs according to two distinct propagation ways:

  • Air-borne noise, when noise propagates freely in the air without encountering solid obstacles.
  • Structural noise, when noise propagates through solid structures by means of elastic vibrations (vibrations indeed).

As we are referring to noise in the middle of the sea, a question arises: where does it come from?
We will soon, with a new FAQ, get deep into the origin and noise transmission mechanism and who are the experts who take care of it.

If you have questions and would like to discuss specific topics, contact us: [email protected]

(What does COMFORT means? – – April 2024)