Receivers

NoiseModelling is a tool for producing noise maps. To do so, at different stages of the process, the application needs input data, respecting a strict formalism.

Below we describe the table RECEIVERS, dealing with the receivers.

The other tables are accessible via the left menu in the Input tables & parameters section.

Table definition

Warning

The two following columns are mandatory

• PK

  • Description: receiver’s unique identifier.

  • Type: Integer - Primary Key

• THE_GEOM

  • Description: 3D receiver’s geometry. Z coordinate correspond to the receiver’s height (relative to ground altitude)

  • Type: Geometry (POINT or MULTIPOINT)

If you are working with receivers based on buildings (e.g 50 cm around the building’s facades - see Building_grid script), your RECEIVERS table will need this additional column:

• BUILD_PK

  • Description: building’s Primary Key (PK), allowing to link the receivers with their building

  • Type: Integer

Parameters

Below are listed the most important input parameters that may be found in the scripts dealing with receivers generation (e.g Building_grid, Delaunay_grid, …) (see Receivers section in the left-side menu of NoiseModelling).

These parameters can be mandatory or optional. When necessary, we indicates the default values and those we recommend (from an acoustic point of view).

Maximum area

• Parameter name: maxArea

• Description: Set Maximum Area. No triangles larger than the provided area will be created. Smaller area will create more receivers (square meters)

• Type: Double

• Default value: 2500

• Recommanded value: 2500

Maximum cell size

• Parameter name: maxCellDist

• Description: Maximum distance used to split the domain into sub-domains. In a logic of optimization of processing times, it allows to limit the number of objects (buildings, roads, …) stored in memory during the Delaunay triangulation (meters)

• Type: Double

• Default value: 600

• Recommanded value:

Road width

• Parameter name: roadWidth

• Description: Set Road Width. No receivers closer than road width distance will be created (meters)

• Type: Double

• Default value: 2

• Recommanded value:

Height

• Parameter name: height

• Description: Receiver height relative to the ground (meters)

• Type: Double

• Default value: 4

• Recommanded value: