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Overview of Hearing Aid Fitting and Verification.

Overview of Hearing Aid Fitting and Verification. Dee Gamble IHR Nottingham. Content of talk. Basic principles ‘Click & Fit’ Vs ‘Frequency Shaping’ Individual examples. Three basic principles. Use generic prescriptions wherever possible, if not use manufacturer’s agreed target

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Overview of Hearing Aid Fitting and Verification.

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  1. Overview of Hearing Aid Fitting and Verification. Dee Gamble IHR Nottingham

  2. Content of talk • Basic principles • ‘Click & Fit’ Vs ‘Frequency Shaping’ • Individual examples

  3. Three basic principles • Use generic prescriptions wherever possible, if not use manufacturer’s agreed target • Verify using REIG/REAG in all patients • Adjust programming of aid if there is a difference between target and the measured response

  4. Manufacturer’s agreed target • NAL NL1 for adults • DSLi/o or NAL-NL1 for children • The generic target needs to have been ‘authorised’ to ensure appropriate modification.

  5. Verification with REIG/REAG • If there’s a target curve, based on mean data or KEMAR, • check it with REIG/REAG/RESR • at the time of first fitting adult/child • on all patients because we cannot predict whose ear acoustics differ from average. • Use the appropriate input signal (speech preferable)

  6. Guideline: • If it’s not +/- 5dB at frequencies 250 - 2k Hz +/- 8dB at 3k and 4k Hz slope +/- 5dB per octave • Investigate the reason for the difference • Adjust the programming if appropriate • Always use clinical judgement

  7. REIG/REAG at follow up • Repeat REIG/REAG/RESR at later appointments if clinically indicated • Always listen to the patient/child/teacher/parent

  8. Working protocol: the ideals • Aids to be set up for everyday use • Compare REM H/A response with the REM target within the software of the Aurical/Unity • Use equipment that allows two NOAH modules to work simultaneously i.e. one for measurement and the other for adjusting the hearing aid

  9. Example of Click and Fit vs Verification with REMs Click+Fit REIG REUG

  10. Example of Click and Fit vs Verification with REMs H/A Adjusted to match REIG target REUG

  11. Summary • DSP aids offer great advantages to our patients • Care is needed in following REIG/REAG protocols with appropriate targets and input signals for each type of aid • Verification can help in maximising the advantage

  12. All of these issues are covered in more depth during the practical training days.

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