D-0133833-A – 2022/09
AD629 - Instructions for Use - EN
Page 45
Special tests/test battery
SISI. ABLB. Stenger. Stenger Speech. Langenbeck (tone in noise). Békésy
Test. Weber.
2 channel speech, 2 channels Master Hearing Aid, Auto threshold.
Auto threshold tests:
Available time for patient to respond:
Same as tone presentation
Increment of hearing level:
5dB.
Auto threshold test (Békésy):
Mode of operation:
Békésy
Rate of level change:
2.5 dB/s ±20%
Smallest increment of level:
0.5 dB
Stimuli
Tone
125-20000Hz separated in two ranges 125-8000Hz and 8000-20000Hz.
Resolution 1/2-1/24 octave.
Warble Tone
1-10 Hz sine +/- 5% modulation
Wave file
44100Hz sampling, 16 bits, 2 channels
Masking
Automatic selection of narrow band noise (or white noise) for tone
presentation and speech noise for speech presentation.
Narrow band noise:
IEC 60645-1:2001, 5/12 Octave filter with the same centre frequency
resolution as pure Tone.
White noise:
80-20000Hz measured with constant bandwidth
Speech Noise.
IEC 60645-2:1993 125-6000Hz falling 12dB/octave above 1KHz +/-5dB
Presentation
Manual or Reverse. Single or multiple pulses.
Intensity
Check the accompanying Appendix
Available Intensity Steps is 1, 2 or 5dB
Extended range function: If not activated, the Air Conduction output will be
limited to 20 dB below maximum output.
Frequency
range
125Hz to 8kHz (Optional High Frequency: 8 kHz to 20 kHz)
125Hz, 250Hz, 750Hz, 1500Hz and 8kHz may freely be deselected