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Vinyl flooring must be of the solid type with
a thickness of ≥2 mm and linoleum must have a thickness equal to ≥2,5 mm's. |
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Impact Sound |
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The DECIBEL1 as an underlay gives great impact sound improvement
when placed under vinyl and linoleum mats. The classification for impact
sound muffling (improvement) range from class 3 (<5 dBs) to 8A (25-28 dBs),
measured on concrete beams. |
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Decibel1 combined with a 2 mm's
"solid" vinyl mat, or linoleum will give 27 dBs
impact sound improvement (D L'nw), which meet the requirements
for the highest class, class 8A.
For comparison it could be mentioned that vinyl and linoleum flooring
with an acoustically muffling foam back, generally are close to 17
dB in muffling. |
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An Example of Impact Sound Reduction |
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We have performed a series of tests in order to measure the characteristics
of the DECIBEL1 mat concerning the reduction of the impact sound level. As an
example we graph the result of a linoleum carpet glued onto a DECIBEL1 that
in its turn has been applied to a HD/F120/19 + 40mm's concrete topping
respectively a 220 mm's homogenous concrete. The black diagram graphs
indicate both floor structures without any measures. |
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HD/F120/19 + 40 mm's topping |
220 mm's homogenous concrete |
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The result indicates great improvement compared to the starting point.
HD/F120/19+40mm's from L'n,w = 83 dB to an L'n,w = 46 dB,
i.e. -37 dB, and 220 mm's solid concrete, from L'n,w = 74 dB to an L'n,w =
44 dB, i.e. -30 dB. Those are great results. |
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For customized calculations on optional constructions we refer to the
calculation programme BASTIAN, where the parameters for different
constructions are in the database. If you do not have access to this programme,
please contact us so we may help you performing the desired calculations. |
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Drumsound |
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An annoying acoutic problem is the drumsound. This is created
when people walk on the floor and the disturbing sound affects other persons who are in the
same room. Although, a great sound spectrum is created by people walking it is mainly the
higher frequencies that generally are considered annoying. (See critical range). |
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In the graph to the right a comparison between a linoluem floor with and witout DECIBEL1 is shown. The muffling is considerable
and the floor gets a totally different quality. It is also possible to muffle drumsounds by installing sound absorbers on the walls or in the ceiling. We
feel that the problem can be solved more smoothly and to a lower cost by laying
the DECIBEL1 mat under the vinyl/linoleum mat and thus reducing a great deal
of the problem already in the floor. |
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Acoustical Absorption |
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By laying DECIBEL1 under e.g. a
linoleum mat, a muffling of the sound in the room is achieved. In the graph
below the difference between a linoluem mat with and without DECIBEL1
installed under is shown. The result shows a significant improvement over
a wide frequency range with the DECIBEL1 mat. |
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We do not regard this as our main argument
for the product, since it is possible to achieve this muffling in alternative
ways, but it gives the DECIBEL1 mat another advantage. |
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Airborne Sound |
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DECIBEL1 or other underlay products have little
or no affect on the muffling of airborne sound when they are installed under
plastic or linoleum flooring. |
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