geometry
========
- coord_#.txt contains the sensors information inside bay #. 
  The format of the data is as follows:

       Sn dX dY Section S Nr

  where
  - Sn: the sensor global identification number in the format bay##. Ex A31. 
  - dX dY: the coordinates of its position (mm). Each file uses a different system of 
    coordinates: the point (0,0) is typically assumed to be one of the sensor
    in the bay. A translation is necessary to convert the geometry data in these files 
    in the same coordinates as used in file damage_locations.txt (see below).
  - S: the section number inside the bay. The activation and
    listening is done on sensors with the same section number.
  - Nr: the local sensors numbering inside each section.
  Note: Sensors identified with V## and "x x" under S and Nr columns are
        actually the vertex coordinates (mm) of the polygon defining each bay

- damage_locations.txt contains the coordinates (mm) of damage locations with
  respect to sensor A31. The format is: 1st and 2nd columns X and Y
  coordinates, 3rd column bay in which the damage was created.

Signals:
========

* T0 *

Before assembly
 
* T1 *

Between assembly and fatigue testing

* T2 *

Between fatigue testing and impacts

* T3 *

After impacts

Note
====
To clean the signals from the feed-through introduced by the high-voltage gated amplifier adopted in the 
generation of the database, it is possible to use the script ./matlab/cleanSignal.m. An example on how to use 
the script is inside the file.