Proceedings of the Institute of Acoustics
Figure 1. Graphical output of the optimiser software. Original response
x
(
f
)
, target response
x
0
(
f
)
and equalised response
y
(
f
)
, cut-off frequencies (triangles), optimisation range (crosses) and target
tolerance (dotted lines). Output section on the right displays possible settings and values to be
changed (green background) as well as the error function value and processing time.
Figure 2. Case example, statistical analysis output.
4.3 Results
63 loudspeakers were measured before and after equalisation (12 small two-way, 22 two-way, 30
three-way and three large systems). Depending on the product type, not all of the room response
controls are available (Tables 1–4). Table 12 shows the number times a control was used when
available on a loudspeaker. The midrange level control is used the most frequently and the bass
roll-off the least.
x
(
f
)
y
(
f
)
x
0
(
f
)
