en</td>
<td>Euclidean norm of low-pass filtered x, y and z axis</td>
<td>Average</td>
<td>do.lfen</td>
<td>Not attempted</td>
</tr>
<tr class="even">
<td>hfx</td>
<td>High-pass filtered x-axis</td>
<td>Average</td>
<td>do.hfx</td>
<td>Frequency</td>
</tr>
<tr class="odd">
<td>hfy</td>
<td>High-pass filtered y-axis</td>
<td>Average</td>
<td>do.hfy</td>
<td>Frequency</td>
</tr>
<tr class="even">
<td>hfz</td>
<td>High-pass filtered z-axis</td>
<td>Average</td>
<td>do.hfz</td>
<td>Frequency</td>
</tr>
<tr class