Introduction
The RA0113 is a 2 cm
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IEC 126 coupler which uses a 1” microphone, e.g. the G.R.A.S. 40EN.
The microphone (with its protection grid removed
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) screws into the base of the RA0113. In all
other respects, this Coupler is equivalent to the RA0038.
The RA0113 complies with the following international and national requirements for acoustically
testing insert type hearing aids:
IEC 60318-5 reference coupler for the measurement of hearing aids using earphones cou-
pled to the ear by means of ear inserts (formerly IEC 126 )
ANSI/ASA S3.7-2016 Method for Measurement and Calibration of Earphones
Components
The RA0113 comprises the following user-serviceable components:
GR0722K Coupling Housing
GR0723 Tube Adapter
GR0316 Union nut
The RA0113 is delivered assembled as shown in Fig. 1.
Available Accessories
In addition, the following accessories are available:
RA0114 Adapter for ¼” button type hearing aids
RA0115 Moulding adapter for ITE (In The Ear) hearing aids
RA0116 Adapter for using a ½” microphone, e.g. G.R.A.S. 40AG.
Fig. 2. shows the various ways of assembling the coupler depending on what type of hearing aid
is to be tested, using both included and available accessories.
Note the O-ring (OR5003) in the Coupler housing to ensure snap fitting for each of the hearing-
aid Adapters. This will save time in situations where the Union nut GR0316 is unnecessary
between numerous Adapter changes.
Fig. 1.
2cc Coupler RA0113 assembled as delivered
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A microphone without its protection grid should be handled with the utmost care!
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LI0073 – 28 September 2017
