Lyngdorf Audio TDA 2200 - Manual (Page 26)

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d. Room Measurements
The number of room positions needed depends on the value of RoomKnowledge, if it is
below 90% after the third measurement the guide automatically includes extra room
measurements until a RoomKnowledge of 90% or more has been achieved.
The remaining measurements are to be placed in random positions in the room with
random orientations of the microphone. Choosing these random or arbitrary positions and
orientations is easy. All you have to do is place the microphone at different positions in the
room and with different orientations. It is important to perform well spaced measurements
to get a covering image of the acoustical properties in the room, i.e. varying positions,
heights and orientations of the microphone.
For an optimal room correction it is very important that the measurements are:
1. performed more than 1 meter (approx. 3 feet) away from the loudspeakers,
2. not performed behind the loudspeaker, and
3. that there is at least 50 cm (approx. 1.5 feet) between each measurement.
These points are illustrated in figure 4.
Fig 4: Illustration of guidelines for room measurements
When a random measuring position and microphone orientation has been chosen press
enter. The measuring process will start and the display will show the following while
measuring.
The measurement will stop prematurely if an error occurs during the measuring process. In
this case, the error message is displayed. Press enter to continue.