Comparing To The Manufacturers Specification Sheets; Telecoil Testing - Interacoustics Affinity 2.0 Additional Information

2.0
Affinity Additional Information

3.6.10 Comparing to the manufacturers specification sheets

When comparing a measurement to the hearing aid manufacturer's specification 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 manufacturers use known international standards, such as the ANSI or IEC for their
specification sheets. The same standard can usually be selected in the HIT440 software.
The hearing aid can typically be programmed with a "technical measurements" setting found in the fitting
software (please refer to the manuals of the specific hearing aid brands for details). These ensure correct
settings for the ANSI/IEC comparisons.
If you do not use international standards, please be sure to check the following:

Ensure that the stimulus used in HIT440 is the specification sheets

Ensure that the input level used in the HIT440 is the same as in the specification sheets

Ensure that the hearing aid is programmed with the exact same gain settings as used in the
specification sheets.

3.6.10.1 Telecoil Testing

For all telecoil measures please ensure that the hearing aid telecoil is activated.
2.0
The Affinity test boxes include a magnetic field which enables testing of hearing aid telecoils. This is
relevant for frequency responses, gain curve, harmonic distortion, battery current drain, OSPL90, and full-on
gain.
Procedure:
1)
Place the hearing aid in the test box as described in section 0.
2) Switch to the telecoil program
3) Perform the telecoil tests as described in section 3.7.1.
If the parameters are not accordance with each other the comparison will
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