natus Aurical HIT, User Manual, Page: 18 / 28

Acoustic stimulus generation
In closed test chamber
Frequency response, re. 1 kHz, main loud-
speaker (equalized) 125 to 200 Hz: ± 3.0 dB
200 to 2000 Hz: ± 1.5 dB
2000 to 5000 Hz: ± 2.5 dB
5000 to 10000 Hz: ± 3.0 dB
Frequency response, re. 1 kHz, rear loud-
speaker (equalized) 125 to 10000 Hz: ± 3.0 dB
Maximum output level, main loudspeaker 90 dB SPL (pure tone), 78 dB SPL (speech)
Harmonic distortion, acoustic tone out-
put, main loudspeaker Less than 0.5 % up to 70 dB SPL, Less than 2.0 %, 70-90 dB SPL
Acoustic measurements
Frequency range, coupler microphone
(equalized) 125 to 200 Hz: ± 3 dB
200 to 5000 Hz: ± 1 dB
5000 to 10000 Hz: ± 3 dB
Battery simulator
Voltage range 0 to 2.0 V
Resolution, voltage 0.02 V
Accuracy, voltage ± 0.05 V
Output impedance range 3 to 10 ohm
Resolution, impedance 0.1 ohm
Accuracy, impedance ± 5 %
Current measurement range 0.5 to 40 mA
Current measurement accuracy ± 5 %
Tele coil
Max. field strength 31.6 mA/m
USB interface
Type: USB device port, type B
Interface: USB 2.0
Speed: High speed
Power consumption: Max. 2.5 W
Dimensions
Approximately, WxDxH 16 x 31 x 28 cm (6.3 x 12.2 x 11 in)
18 Aurical HIT
8 Technical specifications