9
OTHER POINTS TO PAY ATTENTION TO:
While mounting a column speaker, there are still some other points you need to pay
attention to.
- Make sure that the loudspeaker array is always visible for everyone in the listening-
area, this ensures a good audibility of the high tones. High tones can be compared with
light. When something is between the observer and the light source, the observer can’t
see the light source at it’s full power, this is what we call shadow.
For high tones, the same thing can be said. When someone is standing between the
listener and the loudspeaker, the listener is located in the “sound shadow”. The “sound
shadow” will be experienced as a reduction of high tones.
- When the loudspeaker is installed at a very small angle, a large listening area can be
achieved. Depending on the amount of reverberation in the room and the “sound sha-
dow”, the speech intelligibility on a far position may be low. In this situation, it is recom-
mended to use more loudspeaker arrays to split the listening area.
- When you move further than the maximum position of the listening area (further than
the maximum distance of the loudspeaker array), only the sound pressure level will de-
crease. There will be almost no tone height variation. The decreasing factor of the sound
pressure level depends strongly on the reverberation of the room.
- When you are located too close to the loudspeaker array (closer than the minimum
distance) a decline of the high tones will occur very soon.
- Because the loudspeakers are designed to beam the sound just above the listeners
ears, it’s better to mount the speakers not to high above the listening area.
- When you want to determine where exactly the edges of the listening area are located
in your situation, you have to do a practical test at this location. This is a job for an ex-
perienced listener with well-trained ears. Put pink noise through the loudspeaker array,
and reduce the lower tones for this test because they do not contribute to speech intel-
ligibility. Walk around in the listening area and pay attention to the high tones. The places
where the high tones decrease rapidly are the edges of the listening area.
Summary of Contents for AXIR/O Series
Page 1: ...1 AXIR O User Manual www audac eu ...
Page 12: ...12 Polar patterns ...
