User's Manual

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When both measurements have been taken, in the ear and in the coupler, the
difference between them allows automatic calculation of the RECD curve,
which will be used during the course of the coupler mode fitting procedure.
For further details on using the Maestro software for acquisition of the
RECD curve, refer to the heading entitled RECD in the Operator manual
Maestro – Fitting and hearing aid test functionalities – User Manual.
Drum
To enable measurements with the coupler using the Drum instrument, the
same considerations apply as for the RECD unit, since the accessories
supplied with the product are the same (except for the 25 mm silicone tube,
which is bent to a right angle rather than straight, but entirely similar in
terms of use). The only action required is to connect the Drum to the same
PC as the Trumpet.
For an overview of how the hearing aid is positioned correctly in the Drum
instrument, refer to the Heading Position the hearing aid in the test
chamber of the relative manual: Drum – User Manual.
Before performing an RECD measurement with the Drum, the software will
check that the alignment of the microphones is still as required; if not, refer
to the section on Calibration and alignment of microphones in the relative
manual: Drum – User Manual .