Cochlear SPrint Sound Processor Información técnica Pagina 29
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CLINICAL GUIDANCE | SECTION ONE
27
The recipient does not hear this stimulation. For MAPs that are personalized
for different listening environments, provided that the current levels, MAP
stimulation rate, channel pulse width and mode are the same as the first
optimized MAP, Custom Sound does not perform additional measurements.
The power level is set to the same level as the first MAP. However, if you are
writing MAPs to the sound processor and they have a different channel pulse
width, stimulation mode or MAP stimulation rate, Custom Sound remeasures
the impedances and stimulates on the channel with the highest electrode
voltage. The recipient may hear up to four beeps when writing four different
MAPs to the sound processor.
Manual Power Level Setting
It is recommended that Auto Power is used wherever possible, however, you
may need to use a manual power level for the following reasons:
• the recipient is not in the clinic to make the measurements and the MAP
should be set to the power level that was used during their last visit;
• the optimized power set is artificially high because of one or more channels
and you do not want to eliminate these channels from the MAP;
• you are a service centre and the recipient’s MAP should be sent to the
recipient with the power level that was set in their clinic;
• you do not want the recipient to hear the C-level beep when the power
level is optimized (for Nucleus CP810/Freedom processors).
To use the manual power level, select to use a manual power level in the
software. If you are a service centre, you may want to set your clinician
preference to not optimize the power level and use the power level set in the
MAP. This preference is only available for CP810/Freedom sound processors.
1.9 SOUND CODING STRATEGIES
Sound processing strategies represent a set of rules that define how the sound
processor analyzes acoustic signals and codes them for delivery to the cochlear
implant. Freedom
™
and CP810 sound processors use sophisticated digital signal
processing and state-of-the-art pulsatile sound processing strategies. The
following sound processing strategies are available in Custom Sound
™
(not all
processors or implant types support all of the strategies).
The following sound processing strategies are available in Custom Sound:
• ACE
™
/ACE(RE) (Advance Combination Encoder) strategy,
• SPEAK (Spectral Peak) strategy,
• CIS/CIS (RE) (Continuous Interleaved Sampling) strategy.
- Cochlear 1
- Getting started 5
- T-level Assessment Procedures 6
- C-level Assessment Procedures 7
- 1.1.1 Behavioural Procedures 9
- Figure 2 : Loudness 18
- Base Level = 4 18
- Q varies 18
- 1.5 STIMULATION MODES 19
- Figure 3: Bipolar 20
- 1.6 TELEMETRY MEASUREMENTS 22
- and N24 series Cochlear 23
- Implant Systems 23
- 1.7 VOLTAGE COMPLIANCE 23
- 1.7.1 CI500 series, Freedom 23
- 1.7.2 Nucleus 24
- 24 System 24
- 1.7.3 Nucleus 25
- 22 System 25
- 1.8 POWER OPTIMIZATION 25
- 1.9 SOUND CODING STRATEGIES 29
- 1.9.1 ACE 30
- /ACE (RE) 30
- 1.9.2 SPEAK 31
- 1.9.3 CIS/CIS (RE) 33
- 1.11.1 Microphone Sensitivity 36
- 1.11.2 Volume Setting 37
- 1.12 NUCLEUS 38
- SMARTSOUND 38
- 1.12.1 ADRO 38
- 1.12.2 Whisper 39
- Whisper boosts soft 40
- 1.12.3 Focus (using Beam 41
- Figure 13 : A block 42
- 1.12.4 Zoom 45
- CP810 Zoom 46
- Freedom Dir / 46
- CP810 Standard 46
- (without zoom) 46
- Processor 46
- 1.12.5 Autosensitivity 47
- 1.13 SMARTSOUND 48
- ENVIRONMENTS 48
- Environment Options 49
- EVERYDAY 49
- 1.14 OBJECTIVE MEASUREMENTS 51
- 1.15 GUIDANCE FOR FM FITTINGS 53
- 1.15.1 CP810 Sound Processors 53
- SECTION 2: PROGRAMMING 57
- RECOMMENDATIONS FOR 57
- SPECIALTY DEVICES 57
- Figure 2: 58
- Descriptive 58
- Nucleus 24 ABI 58
- 2.1.1.2 Programming the ABI 59
- Pitch magnitude 1 – 100 60
- Loudness 1 – 10 60
- Figure 8 : T-levels 66
- 2.1.1.3 Managing Side Effects 67
- 2.1.1.4 Fine Tuning the ABI 68
- Figure 9 : Nucleus 70
- ABI 24M pitch 70
- 2.1.1.6 Rehabilitation 71
- 2.1.1.7 ABI Worksheets 72
- 2.1.2 THE NUCLEUS 74
- 24 DOUBLE ARRAY 74
- CLINICAL GUIDANCE 77
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