Interacoustics AC40 Instructions For Use Manual page 56

AC40 Instructions for Use - US
Masking
Presentation
Intensity
Frequency range
Speech
External signal
Free Field output
(non-powered)
Internal storage
Signal Indicator(VU)
Data Connections (sockets) for
connection of accessories
External devices (USB)
HDMI output
Input Specifications
Automatic selection of narrow band noise (or white noise) for tone presentation and speech
noise for speech presentation.
Narrow band noise:
IEC 60645-1 2012, 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) Frequency
[Hz]
125-250
TDH39
(IEC 60318-3 Coupler)
250-4000
4000-6300
DD45 125-250
(IEC 60318-3 Coupler) 250-4000
4000-6300
E.A.R Tone 3A 250-4000
(IEC 60318-5 Coupler)
IP 30 250-4000
(IEC 60318-5 Coupler)
B71 Bone Conductor 250-4000
(IEC 60318-6 Coupler)
2% THD at 1000 Hz max output +9 dB
(increasing at lower frequency)
Level range:
1. Ext. sign: CD input
Speech replaying equipment connected to the CD inputs 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
500 patients and 50.000 sessions/measurements/audiograms (may depend on session
type/size)
Time weighting:
Dynamic range:
Rectifier characteristics:
Selectable inputs are provide with an attenuator by which the level can be adjusted to the
indicator reference position(0dB)
4 x USB A
1 x USB B for PC connection (compatible with USB 1.1 and later)
1 x LAN Ethernet (not used)
Standard PC mouse and keyboard (for data entry)
Supported printers: Please contact local distributer for a list of approved PC printers.
Provides a copy of the built-in screen in HDMI format 800x600 resolution
TB 212 uVrms at max. gain for 0dB reading
Input impedance : 3.2KOhm
Mic.2 212 uVrms at max. gain for 0dB reading
Input impedance : 3.2KOhm
CD1/2 16mVrms at max. gain for 0dB reading
Input impedance : 47KOhm
TF (side panel) 212uVrms at max. gain for 0dB reading
Input impedance : 3.2KOhm
TF (front panel) 212uVrms at max. gain for 0dB reading
Input impedance : 3.2KOhm
Wave files Plays wave file from internal SD card
Linear [dB]
2
Ext. Int. sign
1
sign
+0/-2 +0/-2
+2/-2 +2/-1
+1/-0 +1/-0
+0/-2 +1/-0
+1/-1 +1/-1
+0/-2 +0/-2
+2/-3 +4/-1 (Non linear)
+2/-3 +4/-1 (Non linear)
+12/-12 +12/-12 (Non linear)
-10 to 60 dB HL
2. Int. sign: Wave files
Total Harmonic Distortion
80 dB SPL < 3%
100 dB SPL < 10%
300mS
23dB
RMS
Page 52
FFequv [dB]
2
Ext. Int. sign
1
sign
+0/-8
+0/-8
+2/-2 +2/-2
+1/-0 +1/-0
+0/-8 +0/-7
+2/-2 +2/-3
+1/-1 +1/-1