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MED-EL hearLIFE DUET 2 Fittings Manual

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Cochlear Implants
DUET 2 Fitting Guide
AW5764_3.0 (English)

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Summary of Contents for MED-EL hearLIFE DUET 2

  • Page 1 Cochlear Implants DUET 2 Fitting Guide AW5764_3.0 (English)

  • Page 3: Table Of Contents

    1. Table of contents 1. Table of contents 1. TABLE OF CONTENTS 2. HARDWARE SETUP Connecting the DIB II Connecting the HI-PRO box Cochlear Implant Acoustic Unit 3. APPENDIX Gain Low frequency slope AGC Ratio Volume 4. CONTACT MED‑EL...

  • Page 4: Connecting The Dib Ii

    2. Hardware setup 2. Hardware setup CONNECTING THE DIB II The DIB II provides a connection between the CI system and the personal computer with the MAESTRO software. This interface allows implant checks, objective measurements and programming. Make sure that you are using a DIB II. You will find the version of your DIB at the right front side.
  • Page 5 2. Hardware setup • Launch the MAESTRO software and log in as administrator. • Click on Settings in the toolbar and select the field Hardware. • Choose the COM port used for the DIB II. Just try various options one after the other in the MAESTRO software.

  • Page 6: Connecting The Hi-Pro Box

    2. Hardware setup CONNECTING THE HI‑PRO BOX The MAESTRO software supports acoustic unit fitting via the HI-PRO box. Select the corresponding comport in the Hardware setup editor. Make sure the Mute Acoustic Unit at Connection time checkbox is enabled and press Reconnect. Fig.

  • Page 7: Cochlear Implant

    2. Hardware setup COCHLEAR IMPLANT The DUET 2 Audio Processor is an accessory to the OPUS 2. The cochlear implant component of the DUET 2 is programmed in a similar way to the OPUS 2. Step 1 Press the Add processor button and select OPUS 2 from the dropdown list.

  • Page 8: Hardware Setup

    2. Hardware setup Step 2 The crossover frequency between acoustic and cochlear implant stimulation is based on the user’s post-operative unaided audiogram. Open the Audiogram task to enter air conduction thresholds. The crossover frequency can be found where the hearing loss crosses the 65 dBHL line. Fig.
  • Page 9 2. Hardware setup Step 3 Open a new fitting task and change to the Frequency Bands tab. Activate the Display Cross- over Frequency checkbox. The frequency range covered by the acoustic unit is indicated by the grey area. Click the Use Crossover as Minimum button to adjust to the crossover frequency determined in step 2.
  • Page 10 2. Hardware setup Step 4 Go back to the Levels tab and define all stimulation parameters. Activate the map and make sure it creates sufficient loudness sensation. Press Save and Close to finish the cochlear implant fitting. Fig. 8 CI stimulation parameters...
  • Page 11 2. Hardware setup Open a new configuration task. A map can be assigned to a program position by selecting it from the drop-down list, which appears after clicking on the arrow symbol in the field in the upper area of the applicable program position or by drag and drop from the database view. After assigning a map to a program position, a preview of the map appears in the dialog of the applicable program position.
  • Page 12 2. Hardware setup Step 5 Reassemble the DUET 2 processor and put 675 zinc-air batteries into the battery pack. Make sure the DUET 2 is turned on. To connect the DUET 2 acoustic unit to the MAESTRO software the HI-PRO box is required. Plug the DUET 2 programming cable into the CS44 plug and make sure it is connected with the corresponding HI-PRO box socket for the left or right side.

  • Page 13: Acoustic Unit

    2. Hardware setup ACOUSTIC UNIT The acoustic amplification of the DUET 2 is adjusted via the Acoustic Fitting task in the MAESTRO software or using four trimmers. The MAESTRO software indicates if the DUET 2 acoustic unit is adjusted via trimmers or the HI-PRO box interface. VOL –...
  • Page 14 2. Hardware setup Step 6 Press the Switch to Software Fitting button to change to software fitting. Fig. 11 MAESTRO Acoustic Fitting task The software indicates that the acoustic amplification is adjusted using software and HI-PRO, the trimmers are disabled.
  • Page 15 2. Hardware setup Press First Fit to get an automatic gain and Low Frequency Slope setup. Fig. 12 MAESTRO Acoustic Fitting task Follow the recommendation in the Appendix section when using the trimmers to adjust the acoustic part of the DUET 2. Starting from this basic fitting, the parameters can be fine-tuned according to the user’s individual needs.
  • Page 16 2. Hardware setup Press the Program button to transfer the acoustic unit settings to the DUET 2 processor. Fig. 13 MAESTRO Acoustic Fitting task The internal memory which stores the acoustic unit fitting parameters does not include Acoustic Fitting task names. When the Read button is pressed only the acoustic amplification parameters are uploaded.

  • Page 17: Appendix

    3. Appendix 3. Appendix GAIN Based on the user’s audiogram at 500 Hz, determine the half-rule gain as follows: 500 Hz Gain: = dB 60 dB In this example the threshold for 500 Hz is at 60 dB. So the gain is: = 30 dB.
  • Page 18 3. Appendix Based on your gain calculation, set the gain using trimmer . If the user’s gain exceeds the  maximum of 42 dB, it should be set to the maximum level. Control Turning range Values (db) 39.5 29.5 34.5 42 dB gain 27 dB gain at 500 Hz...

  • Page 19: Low Frequency Slope

    3. Appendix LOW FREQUENCY SLOPE Determine the difference between the audiogram findings at 250 Hz and 500 Hz. Divide this difference by 2. This will give you the setting for the low frequency slope. – THR 500 Hz 250 Hz Low frequency slope: = dB/octave In this example the threshold for 500 Hz is at 60 dB and for 250 Hz at 40 dB.
  • Page 20 3. Appendix Use trimmer to set and adjust the low frequency slope as needed.  Control Turning range Values (db / octave) Reduced low Flat low frequency frequency curve curve Frequency (Hz) Fig. 17 Low frequency slope trimmer positions...

  • Page 21: Agc Ratio

    3. Appendix AGC RATIO Using trimmer  , set the AGC ratio to a comfortable level for the user. Most users prefer the position: 1.33:1 Control Turning range Values 1.6:1 1.33:1 1.14:1 2.65:1 Frequency (Hz) Fig. 18 AGC ratio trimmer positions...

  • Page 22: Volume

    3. Appendix VOLUME Fine tune using the Volume (VOL) trimmer. Gradually increase the volume from the minimum setting. The aim is to have the loudness balanced between acoustic amplification and CI stimulation. Control Turning range Values (db) –42 – 42 dB 0 dB Frequency (Hz) Fig.

  • Page 23: Contact Med-El

    4. Contact MED-EL 4. Contact MED-EL MED-EL Medical Electronics MED-EL GmbH Sucursal em Portugal Headquarters – Coimbra, Portugal Innsbruck, Austria Tel.: + Tel.: + of ce@pt.medel.com of ce@medel.com MED-EL UK Ltd MED-EL GmbH Niederlassung Wien Barnsley, S SP, UK Wien, Austria Tel.: +...
  • Page 24 MED-EL Japan MED-EL China Tokyo, Japan Beijing, China Tel.: + Tel.: + of ce-japan@medel.com of ce@medel.net.cn MED-EL Liaison Of ce Australasia MED-EL Thailand Subiaco (Perth) WA , Australia Bangkok Tel.: + Tel.: + of ce@au.medel.com of ce@th.medel.com VIBRANT MED-EL...
  • Page 28 MED-EL Elektromedizinische Geräte GmbH Headquarters Fürstenweg Innsbruck, Austria of ce@medel.com www.medel.com...

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