D-0120588-B – 2019/03
Eclipse – Instructions for Use - EN Page 44
3.6.3 Editing of ABR threshold recordings
A typical ABR threshold recording is using NB CE-chirp® LS or Tone Burst for threshold evaluation.
Above is an example of a threshold recording using 2kHz Tone Burst. Note the large PAM response from the
right side caused by the loud stimulus of 80dBnHL. The ABR threshold at 20dB nHL at 2kHz found here
would be well within the range of normal hearing.
3.6.4 Interpretation and use of ABR threshold results
The ABR threshold measurement is used in fitting hearing aids instruments to infants. The ABR to behavioral
correction factors is available in some fitting software such as DSL v5.0a and Oticon’s fitting software. These
offer a solution for the audiologist when the hearing thresholds supplied to them are not corrected.
Right, an example of an estimated audiogram. The purple squares represent the nHL values, while the green diamonds
represent the eHL values. Left are correction values, these Frequency-specific ABR correction factors are used with the
DSL prescriptive formula for air conduction thresholds. The same corrections are applied in the Genie fitting software,
when selecting ‘Tone-burst ABR’.
Further information about threshold determination with ABR can be obtained from Eclipse Additional
Information Manual.
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