The picture at the left side shows the local dependence of the quality of the Stereophonic Sound Localization for a non rectangular room.

To locate a sound source the angle of incidence of the so-called First Wave Front is evaluated by the human ear ('Stereophonic Sound Localization'). The 'First Wave Front' contains all sound waves (including reflected waves) of a sound pulse being sent out from a sound source arriving within 1-2 msec at the human ear.

The deviation of the incident direction of the 'First Wave Front' from the reference direction (e.g. center speaker to listener) is a measure of the quality of the 'Stereophonic Sound Localization'.

The positions of the loudspeakers (B:1 ... B:5) are marked by blue pins. The yellow pin marks the current listening position.

From the picture you will easily notify that 'Stereophonic Sound Localization' is worst in the near of the room walls. Best results are achieved for listening places directly on the perpendicular center line of the two 'Main Speakers' of the surround configuration.

If the color scale of the graphic representation is further zoomed you will realize that there are only some distinct locations on the perpendicular center line with a perfect sound localization. Not all points on the perpendicular center line will experience the same quality of 'Stereophonic Sound Localization'.