Technical specifications
TECHNICAL APPROACH
DSP-based digital hearing protector system.
Software upgradeable.
EARPLUG ATTENUATION DATA
Typical performance
| Frequency (Hz) |
125 |
250 |
500 |
1000 |
2000 |
4000 |
8000 |
| Passive (dB) |
24 |
30 |
34 |
42 |
37 |
33 |
42 |
| ANR (dB) |
9 |
7 |
0 |
0 |
0 |
0 |
0 |
| Total (dB) |
33 |
37 |
34 |
42 |
37 |
33 |
42 |
Mean attenuation between 34 - 42 dB depending on Frequency!
Overall attenuation (passive only)
NRR 29 (ANSI S12.6-1997)
SNR 28 (EN 352-2)
Impulsive noise protection
Instantaneous compression of impulsive sound
ELECTRICAL DATA
Power supply
QUIETPRO® can be powered from a vehicle harness, radio or external power source with voltage 6 – 35 V DC.
QUIETPRO® can operate on two different battery types; Li-Ion rechargeable (one 3.7 V cell) or Lithium CR123 disposable (two 2/3A 3.0 V cells).
>60 h battery time with primary cells and typical user profile
Power, fast charger
Li-Ion battery is charged externally, Nacre charger (IP20) accepts input voltage from 110 - 240 V AC or 10 - 16 V DC and is delivered with four different plugs (US, Australia, UK and EU).
Radio/intercom interface
Input impedance: >10 kohm
Output impedance: < 100 ohm
Input level (programmable): max 10 V peak
Output level (programmable): max 300 mV peak
PTT input/output
Exact radio interface is set by SW parameters.
Service interface
RS232 available for service personnel doing SW upgrade
PHYSICAL DATA
Environmental (MIL-STD 810E/F)
Usage temperature: -30°C to +50°C (Powered by Li-Ion -20° to +50°C)
Storage temperature: -40°C to +63°C (Batteries removed)
Immersion: IP 67, 1m for 30 minutes
EMC/EMI/EMP
Built and tested according to MIL-STD 461-E
Immunity 60V/m
Survival (EMP) 50 kV/m
Size and weight
Height: 75, Width: 80, Depth: 35 millimetres
Weight: 300 g (including batteries)
Earplug: 5 g each
Specifications are subject to change without notice. QUIETPRO og Nacre are registered trademarks of Nacre AS and/or its affiliates in certain countries.
Copyright © 2009 Nacre AS. All rights reserved. |
