Interacoustics Diagnostic Audiometer AD629 Instructions D'utilisation page 18

Date: 2012-01-19
Masking
Presentation
Intensity
Frequency range
Speech
External signal
Free Field
Internal storage
AD629 Instruction for Use – English
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
Manual or Reverse. Single or multiple pulses.
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.
125Hz to 8kHz (Optional High Frequency: 8 kHz to 20 kHz)
125Hz, 250Hz, 750Hz, 1500Hz and 8kHz may freely be deselected
Frequency Response:
(Typical)
TDH39
(IEC 60318-3 Coupler)
DD45
(IEC 60318-3 Coupler)
E.A.R Tone 3A
(IEC 60318-5 Coupler)
B71 Bone Conductor
(IEC 60318-6 Coupler)
Speech replaying equipment connected to the CD input must have a signal-to-noise ratio
of 45 dB or higher.
The speech material used must include a calibration signal suitable for adjusting the input
to 0 dBVU.
Power amplifier and loudspeakers
With an input of 7 Vrms - Amplifier and loudspeakers must be able to create a Sound
Pressure Level of 100 dB in a distance of 1 meter - and meet the following requirements:
Frequency Response
125-250 Hz +0/-10 dB
250-4000 Hz ±3 dB
4000-6300 Hz ±5 dB
250 patients and unlimited sessions/measurements/audiograms
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Frequecy Linear (dB)
1
(Hz) Ext sign Int. Sign
125-250 +0/-2 +0/-2
250-4000 +2/-2 +2/-1
4000-6300 +1/-0 +1/-0
125-250 +0/-2 +1/-0
250-4000 +1/-1 +1/-1
4000-6300 +0/-2 +0/-2
250-4000 +2/-3 +4/-1
250-4000 +12/-12 +12/-12
2% THD at 1000 Hz max output +9
dB (increasing at lower frequency)
Level range: -10 to 50 dB HL
1. Ext. sign: CD input
Total Harmonic Distortion
80 dB SPL
100 dB SPL
FFequv (dB
2 1 2
Ext sign Int. Sign
+0/-8 +0/-8
+2/-2 +2/-2
+1/-0 +1/-0
+0/- +0/-7
+2/-2 +2/-3
+1/-1 +1/-1
(Non linear)
(Non linear)
2. Int. sign: Wave files
< 3%
< 10%