Measurement Geometry
After clicking the “Measure IR” button, the “Measurement Geometry” page is shown and three
different geometry set up is suggested.
Clicking the buttons at top left of the screen. the three measurement scenarios are shown (vertical
section on the left, planimetry on the right). This is just a visualization and reminder for the user that
should check every time the correct geometry and choose one of the three options. The choice
doesn't affect any following measurement or calculation parameters, which are actually compatible
with all the three scenarios.
For each measurement geometry, the minimum distances between loudspeaker, microphone and
obstacles has been computed in order to maintain a minimum distance between:
1) the direct sound wave path, from the loudspeaker to the microphone
2) the reflected sound wave path, from an obstacle (e.g. the floor or the wall) to the microphone
This will allow the Wizard algorithm to cancel out reflected components in the IR without corrupting
the direct component information, at least in a useful, well defined frequency band.
This technique creates a sort of virtual anechoic room, which is fundamental to make the FIR
equalization strictly related to the sound system and independent from the measurement space: in
this way, the FIR will work fine also in other environments.
