Verifit
®
User's Guide Version 4.8 © November 2016
1/3 octave band SPL Add to band SPL for
Speech
Hz Calibrated Female Child
ICRA
Noise
Pink
Noise
Own
Voice
Loud
FM
Chest
FM
Boom
200 57.6 54.6 39.4 53.3 52.2 9.6 -3.0 6.3 16.5
250 56.3 53.7 52.7 55.4 52.2 10.7 3.1 11.7 21.9
315 53.5 49.7 56.5 55.9 52.2 10.9 9.1 16.5 25.5
400 57.1 55.4 54.1 57.4 52.2 10.0 6.0 13.5 22.7
500 57.1 57.2 55.1 57.3 52.2 10.1 8.6 13.8 26.2
630 55.8 58.0 60.6 55.1 52.2 10.5 11.6 21.4 28.3
800 53.4 54.8 56.2 52.3 52.2 10.8 13.5 26.0 31.2
1000 49.7 52.3 53.4 50.4 52.2 10.1 16.3 26.9 34.0
1250 47.7 50.6 45.1 48.5 52.2 4.4 17.7 22.2 36.4
1600 47.1 52.0 41.7 46.5 52.2 4.2 16.4 22.2 34.8
2000 44.2 50.7 39.3 44.3 52.2 5.9 17.0 20.9 33.8
2500 42.7 48.7 35.2 41.9 52.2 5.6 16.1 18.2 33.2
3150 42.1 48.0 30.0 40.5 52.2 1.7 14.9 13.8 30.8
4000 40.7 40.8 31.5 38.7 52.2 -0.6 14.5 12.2 30.3
5000 40.0 36.0 30.7 36.8 52.2 -1.1 9.2 13.0 27.8
6300 40.6 40.9 33.1 35.0 52.2 -0.2 5.1 11.3 27.1
8000 40.3 39.6 34.9 33.1 52.2 -3.8 3.9 11.9 27.7
10000 40.4 28.0 34.1 31.4 52.2 -7.1 2.3 10.7 26.5
12500 38.2 22.6 31.3 29.9 52.2 -10.6 3.1 9.7 25.5
Overall 65 65 65 65 65 75 75 84 93
The above values may differ slightly from previous software versions due to reanalysis of all stimuli and
modifiers using newer equipment and analysis software.
Microphone location effects
Microphone location effects (MLE) for BTE, ITE, ITC and CIC aids were measured in an anechoic chamber on
a KEMAR manikin relative to a microphone location on the cheek below the earlobe. The MLEs in the
following table are added to the stimulus after the overall rms level has been set.
Deep insertion compensation
The deep insertion of a hearing aid or ear-mold causes the ear canal SPL to be higher than would be estimated
by adding and RECD or WRECD to the coupler SPL measured in the test box. This most commonly occurs with
Completely-in-Canal (CIC) hearing aids. When this hearing aid type is selected in Speechmap Test box, a deep
insertion factor is automatically added to the estimated ear canal SPL. The factor in the following table is from
DSL 5.0 and has been interpolated to 1/3 octave frequencies and extrapolated for frequencies above 6 kHz.
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