Real-Ear Measurements 143
5.5.3 Important Notes on SPL Testing
This section contains somewhat technical details relating to the real-ear SPL
screen.
5.5.3.1 Speech-Weighting Effects on Pure tones
When the normal pure-tone or fast sweep of less than 85 dB is chosen as an SPL
source signal, it is always speech weighted. The corresponding target is also
speech weighted. The measurements and the target will therefore look different
from the target curves displayed in the Insertion Gain Mode.
5.5.3.2 Target Formulas
The target appearing in the SPL Screen normal changes according:
•AIDED2sourcetype
•AIDED2amplitude
•Averageorcustomunaidedresponse
When UNAIDED AVERAGE is chosen in [MENU], the target takes into consider-
ation the KEMAR average unaided response.
When UNAIDED CUSTOM is chosen in [MENU], the target takes into consid-
eration the measured unaided response. If the unaided response has not been
measured before an aided response is taken, the unaided selection automatically
reverts back to AVERAGE, and the target adjusted accordingly.
If no measurement for AIDED 2 has been taken, the target will adjust to the
amplitude and source type of AIDED 2 while you push the keys. If AIDED 2 has
been measured, the target will remain adjusted to the source type and amplitude
of the measured curve. Once you press [START/STOP] to take a new AIDED 2
measurement, the target will adjust to any new source type or amplitude select-
ed.
If you would like to tie the target to a curve other than AIDED 2:
1. Press [MENU] from the real-ear measurement screen.
2. Press [BACK] to enter the Target menu.
3. Use [
∨, ∧] to select TARGET REF.
4. Use [<, >] to select CURVE 1, CURVE 2, CURVE 3, or AUTO. The AUTO
selection always uses the current selected curve to generate the target.
5. Press [EXIT] to return to the measurement screen.
