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Nucleus Freedom Speech Processor
The functional status is displayed at all times via a display.
Bodyworn Controller display has a backlight.
Audio Amplifi cation
Three audio inputs for dual microphones and AUX inputs or Telecoil. All audio processing is
done using Digital Signal Processing (DSP)
Programmability Features
In-built Flash memory for storage of user programs
Signal Processing
The audio signal processing is implemented digitally using DSP technologies.
Digital AGC & ASC with options such as ADRO™, BEAM™ and Whisper™.
Programmable speech coding strategies: ACE™, SPEAK and CIS with a wide range of
programmable parameters available for user’s selection on the same speech processor
Up to 22 high-resolution bandpass fi lters provide spectral energy estimates over the
frequency range 100 to 8000Hz, depending on the program settings. Filters with the
maximum outputs can be selected. These can be varied. The program determines the fi lters
selected and hence the electrodes stimulated.
Environmental conditions
Storage Temperature:
-20
o
C (-4
o
F) to +50
o
C (+122
o
F)
Storage Relative Humidity:
0% to 90%
Operating Temperature:
+5
o
C (+41
o
F) to +40
o
C (+104
o
F)
Operating Relative Humidity:
0% to 90% RH, Splash-proof design
Note
: Check manufacturer’s recommended operating conditions for batteries used in the
speech processor
Equipment classifi cation
The speech processor is internally powered equipment Type B as described in the
international standard IEC/BSI BS EN 60601-1 (1990-01-01) - Medical Electrical Equipment
Part 1: General Requirements for Safety.
Certifi cation and applied standards
The Nucleus® 24 cochlear implant system fulfi ls the essential
requirements listed in Annex 1 of the EC directive 90/385/
EEC on Active Implantable Medical Devices as last amended
N31018F Iss1D03textmas.indd 68
N31018F Iss1D03textmas.indd 68
24/05/2005 4:15:57 PM
24/05/2005 4:15:57 PM
