Directivity
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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 ``DIRECTIVITY``, containing all the directivity parameters. 

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

.. figure:: images/Input_tables/directivity_banner.png
	:align: center

.. note::
	If you want to see how to use this table, have a look to the tutorial ":doc:`Noise_Map_From_Point_Source`" , in the section ``Step 5 (bonus): Change the directivity``

Table definition
---------------------

.. warning::
	In the list below, the columns noted with ``*`` are mandatory

* ``DIR_ID`` *
	* Description: identifier of the directivity sphere
	* Type: Integer
* ``THETA``
	* Description: vertical angle in degrees, 0 (front), -90 (bottom), 90 (top), from -90 to 90
	* Type: Double
* ``PHI``
	* Description: horizontal angle in degrees, 0 (front) / 90 (right), from 0 to 360
	* Type: Double
* ``HZ63``
	* Description: attenuation levels in dB for 63 Hz
	* Type: Double
* ``HZ125``
	* Description: attenuation levels in dB for 125 Hz
	* Type: Double
* ``HZ250``
	* Description: attenuation levels in dB for 250 Hz
	* Type: Double
* ``HZ500``
	* Description: attenuation levels in dB for 500 Hz
	* Type: Double
* ``HZ1000``
	* Description: attenuation levels in dB for 1000 Hz
	* Type: Double
* ``HZ2000``
	* Description: attenuation levels in dB for 2000 Hz
	* Type: Double
* ``HZ4000``
	* Description: attenuation levels in dB for 4000 Hz
	* Type: Double
* ``HZ8000``
	* Description: attenuation levels in dB for 8000 Hz
	* Type: Double