Interacoustics AA222 - Page 72

AA222 Instructions for Use – US Page 66
Speech
Frequency Response:
(Typical)
Frequecy
(Hz)
Linear (dB)
Ext sign
1
Int.
Sign
2
FFequv (dB)
Ext sign
1
Int.
Sign
2
TDH39
(IEC 60318-3
Coupler)
125-250
250-
4000
4000-
6300
+0/-2
+2/-2
+1/-0
+0/-2
+2/-1
+1/-0
+0/-8
+2/-2
+1/-0
+0/-8
+2/-2
+1/-0
DD45
(IEC 60318-3
Coupler)
125-250
250-
4000
4000-
6300
+0/-2
+1/-1
+0/-2
+1/-0
+1/-1
+0/-2
+0/-
+2/-2
+1/-1
+0/-7
+2/-3
+1/-1
E.A.R Tone 3A
(IEC 60318-5
Coupler)
250-
4000
+2/-3
+4/-1
(Non
linear)
IP 30
(IEC 60318-5
Coupler)
250-
4000
+2/-3
+4/-1
(Non linear)
B71/B81 Bone
Conductor
(IEC 60318-6
Coupler)
250-
4000
+12/-
12
+12/-
12
(Non linear)
2% THD at 1000 Hz max
output +9 dB (increasing at
lower frequency)
Level range: -10 to 50
dB HL, overall THD <6%
1. Ext. sign: CD input
2. Int. sign: Wave
files
External signal
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.
Microphone
(Live speech)
The included headset is used for live speech presentation. The monitor headset is a
boom type microphone placed near the mouth of the operator. Before live speech is
performed the microphone gain must be adjusted to 0 VU.
Free Field
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
Total Harmonic Distortion
80 dB SPL < 3%
100 dB SPL < 10%
Signal Indicator
(VU)
Time weighting: 300mS
Dynamic range: 23dB
Rectifier characteristics: RMS
Selectable inputs are provide with an attenuator by which the level can be adjusted to
the indicator reference position (0dB).
Data Connections
(sockets)
1 x USB A (compatible with USB 1.1 and later)
1 x USB B (compatible with USB 1.1 and later)
1 x LAN
1 x HDMI (VGA 640x480)