RAP-ONE II – Quick user guide p.1

NOISE MAP CALCULATION IN 3 STEPS

A room’s noise map is a particularly useful graphic element for analysis and decision making

concerning acoustic treatments to be implemented, but also for presentations and project follow-

ups. With RAP-ONE II, a noise map is rapidly obtained in only 3 steps:

• Definition of the room’s configuration

• Positioning of the noise sources

• Determination of the noise map

1) Definition of the room’s configuration

The first step consists in importing a file (JPG, PNG, BMP or PDF) that will be used as the background

image, making the room’s modeling easier. If you want to change the image’s position or scale, it can

be done during the file importation. A tool is also available to adjust the scale of the model.

RAP-ONE II allows to quickly define the configuration of your room using the features available. With

a simple click, it is possible to add walls, screens, absorbent panels and fitting areas.

Other functions are available to determine the acoustic properties of the room’s surfaces. Note that

the program can be used for any room shape, the only requirement being that the ceiling and floor

are flat and parallel.

The room plan is traced with straight lines by clicking with the mouse.

To define the acoustic properties of the room’s surfaces, a list of predetermined values

is integrated into the software. You only have to choose the values corresponding to the

type of material you are interested in (concrete, aluminum, brick, wood, etc.)

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2) Positioning of the noise sources

With the source tool, it is easy to add and position noise sources in the room plan. Once

this step is done, all that remains is to define their acoustic power. A source’s power

may be provided by the manufacturer. Otherwise, the software will assist you in

evaluating the power using specially designed dialog boxes.

3) Determination of the noise map

To obtain the room’s noise map: Click on the calculator button. In less than a few

minutes, the noise map will appear on screen.

Move your mouse over the noise map to get the exact noise level at where you position the

cursor.

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You can also view the room in 3D using View tools :

NOISE CONTROL AND MANAGEMENT TOOL

Too often, noise reduction treatments are applied and do not produce the expected results. With

RAP-ONE II, these problems are avoided because it allows to know in real time the effectiveness of

treatment or a combination of treatments, and this, before their implementation.

These are some of the questions you probably already asked yourself and to which the software can

answer:

• What will be the increase in noise levels if I add another machine?

• What impact will this new machine have on noise levels perceived by workers?

• What will be the noise reduction if a silencer is installed on a vacuum cleaner or if an acoustic

treatment is done on the ceiling?

• How can I be sure that my sound reduction approach is structured?

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The evaluation of the performance of potential treatments is simple: introduce the acoustic

treatments envisaged in the room by adding screens using the "barrier" tool or by double clicking on

any surface to open a window that allows you to draw a panel and apply absorbent properties.

The new noise map of this room will present the noise levels obtained with the addition of

treatments. The same treatment approach can be applied to the noise sources of the room (eg

adding a silencer).