Interacoustics AA222 Instructions For Use Manual page 71

AA222 Instructions for Use – US
Transducers DD45
TDH39
HDA300
HDA280
B71
B81
E.A.R Tone 3A/5A
IP30
Patient Response One hand held push button
switch
Patient Talk Forward (TF) and Talk Back (TB)
communication
Monitor Output through built-in speaker or through external earphone or speaker.
Special tests/test SISI, ABLB, Stenger, Stenger Speech, Langenbeck (tone in noise), 2 channel
battery speech, Auto threshold
Auto threshold tests:
Available time for patient to respond: Same as tone presentation
Increment of hearing level: 5dB.
Tone 125-8000Hz.
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.
Auto testing: duration 1-2 s adjusted in 0.1 s intervals
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
125Hz, 250Hz, 750Hz, 1500Hz and 8kHz may freely be deselected
Headband Static Force 4.5N ±0.5N
Headband Static Force 4.5N ±0.5N
Headband Static Force 8.8N ±0.5N
Headband Static Force 4.5N ±0.5N
Headband Static Force 5.4N ±0.5N
Headband Static Force 5.4N ±0.5N
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