CLIOwin 7 PCI User's Manual - Audiomatica

110.0
CLIO
180.0
dBSPL
Deg
100.0 108.0
90.0 36.0
80.0 -36.0
70.0 -108.0
60.0 -180.0
20 Hz
100 1k 10k 20k
Figure 10.35
Our last example will cover the merge function. When we measured the system of
Fig.10.17 we stated that the lower frequency limit that had to be considered reliable
was 208Hz. We can easily overcome this limit taking another measurement with the
near-field technique and merge the result with the data of Fig.10.17. Doing near-field
measurement you should readjust the output level so that the maximum sound
pressure does not exceed 110dBSPL as this will prevent Microphone overload problems.
Fig.10.36 shows both the near-field and far-field response. Notice the big level
difference. To merge them it is the far-field measurement which should be the one in
memory. Fig.10.37 shows the Merge Dialog with a transition frequency set to 350Hz.
q y p
120.0
CLIO
180.0
dBSPL
Deg
110.0 108.0
100.0 36.0
90.0 -36.0
80.0 -108.0
70.0 -180.0
20 Hz
100 1k 10k 20k
Fil id l
CH A dBSPL U th d 51 2kH 16K R t l
Figure 10.36 and 10.37
Fig.10.38 shows the merged response. Notice that the near-field measurement level
has been scaled to the far-field one. Two very important functions, CV function and
CI function, are explained in Chapter 13 as they are impedance tools.
110.0
CLIO
180.0
dBSPL
Deg
100.0 108.0
90.0 36.0
80.0 -36.0
70.0 -108.0
60.0 -180.0
20 Hz
100 1k 10k 20k
Figure 10.38
Chapter 10 - MLS 127