Comparing To The Manufacturer's Specification Sheets - Interacoustics Affinity 2.0 Additional Information

3.6.10 Comparing to the manufacturer's specification sheets

When comparing a measurement to the hearing aid manuf acturer's specif ication sheet it is important keep in
mind that the same hearing aid settings that were used in the specification measures should also be
used for the HIT440 measures!
not be valid.
Most hearing aid manuf acturers use known international standards, such as the ANSI or IEC f or their
specif ication sheets. The same standard can usually be selected in the HIT440 sof tware.
The hearing aid can typically be programmed with a "technical measurements" setting f ound in the f itting
sof tware (please ref er to the manuals of the specif ic hearing aid brands f or details). These ensure correct
settings f or the ANSI/IEC comparisons.
If you do not use international standards, please be sure to check the f ollowing:
Ensure that the stimulus used in HIT440 is the specif ication sheets

Ensure that the input level used in the HIT440 is the same as in the specif ication sheets

Ensure that the hearing aid is programmed with the exact same gain settings as used in the

specif ication sheets.
3.6.10.1 Telecoil testing
For all telecoil measures please ensure that the hearing aid telecoil is activated.
The Af f inity 2.0 test boxes include a magnetic f ield which enables testing of hearing aid telecoils. This is
relevant f or f requency responses, gain curve, harmonic distortion, battery current drain, OSPL90, and f ull-on
gain.
Procedure:
1)
Place the hearing aid in the test box as described in section 0.
2) Switch to the telecoil program
3) Perf orm the telecoil tests as described in section 3.7.1.
D-0004576-Q – 2022/05
Affinity/Equinox2.0 – Additional Information
If the parameters are not accordance with each other the comparison will
Page 292