Appendix 1: Specifications
Dimensions and
W x D x H:
14.8 inches x 10.5 inches x 13.8 inches (LCD raised)
Weight
37.5 cm x 26.7 cm x 35.1 cm
Height with LCD lowered:
4.0 inches
10.2 cm
Weight:
8.18 pounds
3.7 kg
Shipping Weight:
20 pounds
9.1 kg
Power Specifications
Power Consumption:
90 Watts
Voltage & Amperage:
100-240VAC, 0.5A max
Frequency:
50 Hz/60 Hz
Channels
1.5
Pure Tone – Channel
Frequency Range
Air Conduction:
125 Hz to 8,000 Hz
High Frequency:*
8,000 Hz to 20,000 Hz (8 kHz, 9 kHz, 10 kHz, 11.2 kHz, 12.5
kHz, 14 kHz, 16 kHz, 18 kHz*** and 20 kHz***)
Full Frequency Range:*
125 Hz to 20,000 Hz
Bone Conduction:
250 Hz to 8,000 Hz
Sound Field:*
125 Hz to 12,500 Hz
Paired Inserts:
125 Hz to 8,000 Hz
Frequency Accuracy:
± 1 %
Total Harmonic Distortion:
< 2% (earphones and paired insert phones)
<5.5% (B81 bone vibrator)
Hearing Level Range **
Air Conduction:
-10 dB HL to 120 dB HL
High Frequency:*
-20 dB HL to 100 dB HL ( DD450)
Bone Conduction (B81) -10 dB HL to 90 dB HL (mastoid)
-10 dB HL to 80 dB HL (forehead)
+/- 10dB (tolerance)
Sound Field:*
-10 dB HL to 90 dB HL (amplified speakers)
-10 dB HL to 102 dB HL (high performance speakers and
external booster amplifier)
Paired Inserts:
-10 dB HL to 120 dB HL
Signal Format
Steady:
Tone continuously present.
Pulsed:
Tone pulsed 200 msec ON, 200 msec OFF.
FM:
Modulation Rate: 5 Hz, sine
Modulation depth +/- 5%
Pediatric Noise*
Continuously presented or pulsed
Speech - Channel 1
and Channel 2
Microphone:
For live voice testing and communications. Microphone
must be used as specified/recommended by the
manufacturer (Sennheiser).
INT/EXT A & INT/EXT B:
Can be utilized for internal wave files or recorded speech
material from an external digital device
Hearing Level Range:
Air Conduction:
-10 dB HL to 100 dB HL (DD45 Linear)
Speech - Channel 1
Bone Conduction (B81):
-
10 dB HL to 60 dB HL (mastoid)
and Channel 2
-10 dB HL to 50 dB HL (forehead)
Frequency response 250 - 4000 Hz: ±12dB
Sound Field:*
-10 dB HL to 90 dB HL (basic speakers)