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The quiet within Lady in Blue is a result of the attention to detail by Amels and a few technical companies.
by Bill Ando
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06/01/2005
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The quiet within Lady in Blue is not integral to her design. It is a
result of the attention to detail by Amels and a few technical companies that
know how to keep the yacht’s operating noises from traveling through the
structure.
JVS in Holland specified the sound insulation material based on
Intersona’s sound and vibration readings. The initial vibration readings were
taken on her steel hull with bulkheads installed. Kor Floriyin, director at JVS,
says that readings were taken three more times as the project progressed.
"During the building we alter the calculations based on the natural frequency
measurements."
Lady
in Blue’s impressive
sound readings were measured at 80-percent maximum continuous duty (MCD),
motoring at 13.5 knots with HVAC operating normally. Quieting the two forward
lower-deck guest cabins that are adjacent to the engine room was achieved by
sandwiching the bulkhead to nearly 12 inches thick with a multiple-layer
proprietary insulation package. The final readings there registered a very
respectable 54 decibels.
Wouter Kleijpoel, project manager, says additional elements, such
as the floating interior and engine and generator shock mounts, all combine to
diminish the vibrations. Mounted on rubber pads, each cabin is its own unit,
referred to as a "box-in-box" structure. Air-conditioning ducts must be wide
enough to keep the air speed low, but not so big as to take up too much
technical space. Conforming to MCA code of practice, the yacht’s fire-retardant
integrity must also be upheld, limiting the materials choices.
Attention to detail is still important even after all the readings
are taken and the appropriate materials specified. Kleijpoel says, "Amels makes
sure that the various elements are properly installed and that the practice
maintains the theory."
 Twice Loved
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