barra
|
|
 |
High
Noise Reduction |
The
quiet around TNF accomodation systems is a reason for installing them
Many
ship and rig owners specify TNF low noise products to improve their
work and leisure environments, which will also be comfortably ahead
of the authorities’ noise level regulations.
There
are three vital parameters, which determine the noise reduction
you can achieve:
•
Ship layout.
• Application of low noise sources.
• Design of low noise cabins.
High
noise reduction is where the Inexa TNF products excel. When correctly
installed, they provide maximum quiet and comfort by reducing unwanted
structural and airborne noises.
The
product range and construction developed for TNF low noise cabins
fall into four main categories.
The
TNF formula for low noise cabins includes:
•
Bulkhead systems with high noise reduction.
• Ceiling systems, self-supporting and fully insulated.
• Floating floor construction.
• Window box of insulated, telescopic construction.
Appearance
is another good reason
The
TNF accommodation system finishes have been as carefully developed
and tested for durability and appearance as they have for their
insulating and fireproofing properties. |
|
TNF
ship interior designed to provide complete low accomodations on ships
and offshore platforms
The
average figures (field values) achieved with TNF high noise reduction
products and constructions are:
•
40-42 dB noise reduction between cabins.
• 10 dBA reduction of structural noise.
These
values cause a considerable improvement on conventional cabin standards.
Don’t
let noise get to you!
Most
modern ships and offshore platforms are constructed to low background
noise specifications.
Low background noise increases the need for an accommodation installation
with high noise reduction values.
In a TNF ship interior with low noise cabins, a noise level of 80
dB in one cabin will be reduced to 35-40 dB in adjacent cabins.
The
diagram to the right illustrates the difference in noise transmission
using interior cabin systems with varying noise reduction values.
Normal
conversation can be heard in the adjacent cabins with conventional
interior systems where the TNF low
|
noise
cabins prevent a normal conversation from being overheard in adjacent
cabins.
The
difference between 30 dB and 40 dB noise reduction is significant.
Audibility
The
audibility of different noise activity levels at given sound insulation
values with low background noise.
Higher
background noise values will cause the audibility curves to move
to the left.
|
High
noise reduction bulkhead system
The
high noise reduction bulkhead panel TNF 2SM has exceptional noise
reduction value – only 50 mm thick, yet giving a lab value
of Rw=44 dB. This B15 class TNF 2SM panel has exactly the same dimensions
and appearance as a standard panel, but provides real privacy due
to its superior insulating properties.
Floating
floor units.
The
TNF FS floating floor units have a steel surface and a underlay
of specially developed insulation material. The floating floor unit
provides extremely effective noise reduction and structural noise
damping, which contributes to the overall quiet of any environment.
Fully
insulated self-supporting ceiling system.
With
a free span up to 3000 mm, the TNF B class ceilings are the lids
on the TNF quiet cabins.
The
TNF ceilings have a noise reduction of Rw=44 dB (lab value). In
combination with TNF 2SM bulkhead panels, a field value of 40-42
dB noise reductions can easily be achieved between cabins and between
cabins and corridor. Used in conjunction with a steel deck, the
vertical noise reduction will be Rw=60 dB (lab value).
Window
boxes.
A
two part telescopic construction, the window outer part is fastened
to the hull, the inner part to the TNF bulkhead panels. This prevents
the transfer of structural noise and vibration to the cabin. Thermal
insulation of the window box has to take place during installation.
|
|
Correct
installation of TNF products is important - they're tailor made for quiet
assurance in the future!
Reduction
of airborne sound
The
inherently high noise reduction values of the prefabricated TNF panel
system are maintained after installation, as interior designs are tailored
to ensure the best results in any type of project.
The product and installation details shown are examples from TNF technical
literature.
Corner
and T-joints
Prefabrication
minimizes noise penetration at the joints and noise transmission through
the steel surface of the panels.
QUIET
panel construction
QUIET
stardard joints
Standard
joints
|
 |
Ceiling
construction
Resting the
ceiling panels on the profile flange, close to the wall panel, reduces
sound transmission between cabins.
QUIET
ceiling
|
STANDARD
ceiling
|
Double
wall constructions
VLD
Velocity Level Difference
Reduction
of structural sound
No hangers provide high Velocity Level Difference (VLD). Transfer of noise
from ship side or steel bulkhead to the wall panels can be minimized by
resting the top channels on the panels.
| Self
supporting ceiling provides high VLD |
 |
| Floating
floor provides high VLD |
 |
| Telescopic
window box provides high VLD |
 |
| Our
technical services department can assist architects and engineers
by creating design proposals of their actual projects, using a 3D
CAD system. The drawings serve as a basis for the contractor to ensure
correct installation. |
 |
|
