Products > Pediatrics > Pediatric Verification

PEDIATRIC VERIFICATION

Pediatric Verification
Using DSL 5.0 Pediatric Fitting Rationale

Suggested protocol for on the ear verification of Widex hearing instruments for or with pediatric patients:

  1. Ensure the following information is properly entered into both Widex CompassTM GPS fitting software and the verification equipment:

    • Age
    • Transducer used
    • RECD values

    If you have not performed RECD, ensure that, “predicted”; or, “average” is selected. RECD values will only need to be entered into the verification software.

  2. Because the ear canal length of children ages 2-12 ranges from 20-25 mm, it is important to begin by running an unaided gain measurement to ensure proper probe tube placement:

    1. Measure the probe tube and insert it into the unaided ear
    2. Present either white or pink noise at a 65 dB SPL level for 10-15 seconds
    3. Proper probe tube placement should look similar to the graph above. If the probe tube is not in far enough, a notch will appear between 4-6 K Hz that will drag the resonance line below the 50 dB SPL mark.
  3. Once proper probe tube length is ensured, insert the hearing aids and close the battery doors

  4. Set the verification system to DSL 5.0 pediatric fitting rationale if the hearing aids were programmed in Compass GPS with the Widex fitting rationale or DSL 5.0 pediatric fitting rationale. (Change to NAL-NL2 if NAL-NL2 was selected in Compass GPS fitting.)

  5. Set the verification system to DSL 5.0 pediatric fitting rationale if the hearing aids were programmed in Compass GPS with the Widex fitting rationale or DSL 5.0 pediatric fitting rationale. (Change to NAL-NL2 if NAL-NL2 was selected in Compass GPS fitting.)

  6. Perform fine tuning within Compass GPS until the hearing aid measures within 5 dB or less of the DSL 5.0 target

Soft Speech, 55 dB SPL
ISTS Signal

Average Speech, 65 dB SPL
ISTS Signal

Loud Speech, 80 dB SPL
ISTS Signal

Suggested protocol for on the ear verification of Widex hearing instruments for or with pediatric patients:

  1. Ensure the following information is properly entered into both Compass GPS Fitting Software and the verification equipment: Age, transducer used, and RECD values. If you have not performed RECD, ensure that, “predicted”; or, “average” is selected. RECD values will only need to be entered into the verification software.

  2. Follow your verification system’s guide to ensure the hearing aid is properly positioned within the test box.

    Soft Speech 55 dB SPL
    ISTS Signal

  3. Set the verification system to DSL 5.0 pediatric fitting rationale if the hearing aids were programmed in Compass GPS with the Widex fitting rationale or DSL 5.0 pediatric fitting rationale. (Change to NAL-NL2 if NAL-NL2 was selected in Compass GPS fitting.)

  4. Measure soft, moderate, and loud sounds by presenting speech stimuli at 55 dB, 65 dB, and 80 dB SPL accordingly. The recommended presentation length is 10-15 seconds, depending on stimuli.

  5. Perform fine tuning within Compass GPS until the hearing aid measures within 5 dB or less of the DSL 5.0 target

Average Speech, 65 dB SPL
ISTS Signal

Loud Speech, 80 dB SPL
ISTS Signal

Please note that verification results will vary based on both the verification system being utilized and the form factor of the hearing aid selected. Consult the user manual for your system for best practices and further guidance.

For more information on verification and validation tools in Compass GPS, contact your local Widex regional team.

For a peer-reviewed overview of the Widex SoundTracker relative to real-ear analysis: Oeding K, Valente M. Differences in in sensation level between the Widex SoundTracker and two real-ear analyzers. Journal of the American Academy of Audiology 2013 24:660-670.

For more information on probe microphone measurements with Widex hearing aids, see: http://www.hearingreview.com