Application Of The Hit440 Tests; Frequency Response - Interacoustics Affinity 2.0 Additional Information

3.7

Application of the HIT440 tests

3.7.1

Frequency response

The f requency response equals the absolute sound level delivered by the hearing aid at each f requency
expressed in dB SPL. This may be measured f or both microphone and telecoil. Prior to the measurement
remember to perf orm the Ref erence Test Gain and set the volume control to the correct position.
The f requency response curve gives you an overview of the hearing aid response and can thereby serve as
a verif ication procedure making sure that the hearing aid is providing the needed response.
Below an example:
Select test
D-0004576-Q – 2022/05
Affinity/Equinox2.0 – Additional Information
The f requency response
shows the total response of
the hearing aid in dB SPL (y-
axis) f or each f requency (x-
axis)
View curve details
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