Verifit
®
User's Guide Version 3.12
November 2015
BTE instruments may be coupled either directly to the HA-2 (BTE) coupler, or to the HA-1 coupler using
the client’s earmold and blue putty. When using the earmold, ensure that the mold is well-sealed to the
coupler and that the medial end is flush with the inside of the coupler opening. Putty should not extend into
the coupler cavity or block the sound outlet. Vents should be sealed at the lateral end. Coupling method
used for BTE instruments (HA-2 or HA-1) must be specified in Instrument type selection on Speechmap
screen. See Using Speechmap, RECD
Custom instruments are sealed to the HA-1 coupler with putty so that the end of the eartip is flush with the
inside of the coupler opening. Putty should not extend into the coupler cavity or block the sound outlet of
the instrument. Vents should be sealed at the faceplate end. It is very important that the instrument be well-
sealed to the coupler.
Open fit instruments may not be verified using Test box speechmap.
RITE (Receiver in the ear) instruments are coupled to the HA-1 coupler using putty to seal the receiver
module or soft tip to the coupler opening.
Excess low frequency output is usually due to open vents or a poor seal to the coupler.
For health reasons, hearing instruments and earmolds should be clean before putty is applied and putty
should be replaced frequently.
Positioning the hearing instrument
1. The hearing instrument should be coupled to the appropriate coupler and a battery or battery pill installed.
See Coupling the hearing instrument and Battery pill use and care.
2. Place the instrument and coupler in the test chamber so that the microphone opening of the instrument is
within the test zone.
3. For directional instruments, the direction of maximum sensitivity should be oriented toward the left speaker.
The axis drawn through the front and rear microphone openings should be perpendicular to the left speaker
grille.
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