Building-Acoustics-Outside

Facade Noise Map Results

On the left is a typical plan from a Facade Noise Map calculation. The presentation is showing the levels at teh Facade on top without a planned noise control wall, on the bottom with the noise control wall in place. As the railway line has multiple tracks and the buildings are relatively close to the tracks, unfortunately it is not possible to shield all floors properly.

In order to not subject the inhabitants of the adjacent buildings to too high noise levels, the next step is to plan for noise control windows. In many noise studies the number of buildings involved is big enough that it becomes worthwhile to use software to assess the needs for windows, dimension them for the various uses of the rooms and than manage the windows upgrade program.

SoundPLAN has 2 ways of calculating the Rw for noise control windows, a quick one that is suited for only a few buildings as an ad-on of the SoundPLAN Spreadsheet and this Noise Control Window Management Module that not only has the provisions for the calculations but also for the presentation to the home owners and the tenants in the apartments.

For the assessment of the noise levels inside the room that is subjected to noise from outside sources, we have 5 different calculation methods in accordance to the 24. BImSchV, VDI 2719, DIN 4109, 2. FlugLSV (German standards) and the ISO 12354-3:2000 (airborne sound insulation against outdoor sound). The ISO 12354 has the main advantage that it can deal with corner rooms where sides facing different directions are subjected to different noise levels.

Import the results from Facade Noise Maps or Single Receivers

The noise levels in from to the buildings facades are directly imported from either a Single Receiver Calculation run or a Facade Noise Map. The noise limits on the outside of the buildings are pre-set by the zoning and the location of the building inside one of the noise zones.

BA Outside is generating a tree from the imported data with the Building (with a given address), the floor, the dwellings and the rooms. Each level has special provisions for the storage of information. For the buildings owner and the tenants an address database is providing the capability to address all parties with an information letter concerning the planned windows improvement program.

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Documenting the housing area

Each object (building or floor) can be associated with a picture and/or a floor plan.

SoundPLAN 7.3 - 32 bit or 64 bit

 

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Set the building/room on a Bitmap

The bitmap is very handy to define the room geometry and define the location of windows and associate them with the calculated noise levels.

 

 

 

 

 

 

The noise limits for the room itself depend on how the room is used. Bedrooms and living rooms of course have stricter limits than kitchens, bathrooms and hallways. For the actual or planned usage of the room the recommended noise limit is inserted. Additional parameters are the room size and the size of the outer walls with the walls and the inserted windows.

 

 

 

 

 

 

 

 

Each room has one or multiple outside walls, these walls can have multiple windows. The size of the surface and the Rw flow into the noise level calculation along with a typical ratio of absorbent surfaces to the room size.

 

 

 

If the noise level exceeds the target level, the noise level is printed in red color to alert the user to define noise mitigation measures such as multiple pane insulated glass, forced air ventilation with quiet fans etc.

 

 

 

 

After all noise control modifications are in place the noise level was inside was reduced from 40 dB to 27 dB which is lower than the limit for this type of room.

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Copyright 2014 SoundPLAN international LLC, Shelton, WA 98584, USA