RM500SL
®
User's Guide Version 3.4
June 2011
You may run the tests at any setting of the instrument controls but ANSI S3.22 requires
that certain settings be used. See ANSI S3.22-1996 facts and ANSI S3.22-2003 facts. The
[Input/Output] test allows you to generate up to 4 separate input/output curves at each of 5
individual frequencies (250, 500, 1000, 2000, 4000 Hz) as provided in ANSI S3.22.
1. Press <Tests>, then highlight and <PICK> [Test box measures], then highlight and
<PICK> [Input/Output].
2. Refer to Coupling the hearing instrument, Positioning the hearing instrument and
Battery pill use and care to prepare the instrument for testing.
3. Turn the instrument ON; set AGC controls or programming parameters as in ANSI 1996
Linear and AGC tests or ANSI 2003 Linear and AGC tests
4. Highlight and <PICK> [Curve 1]. Test setup instructions will be displayed.
5. Press <Continue> to generate a set of 5 input/output curves.
6. To measure another set of 5 input/output curves, highlight and <PICK> another [Curve
#].
7. To summon a cursor to determine curve values, position the mouse pointer on a graph
area and click the left mouse button. Click again to turn it off.
NOTE:
Noise in the test area may cause erroneous results at low input levels (particularly
at 250 and 500 Hz). Ensure that the test box is well sealed and ambient noise is low.
ANSI telecoil terminology
The RM500SL test chamber contains an integrated telephone magnetic field simulator
(TMFS) meeting the requirements of ANSI S3.22, that enable the measurement of coupler
SPL produced by a hearing instrument with a telephone pickup coil. ANSI uses the
following terms in telecoil testing:
RTG
(reference test gain) is the average gain measured with the gain control in the
reference test position (1996) or reference test setting (2003). See ANSI S3.22-1996 facts
and ANSI S3.22-2003 facts.
TMFS
(Telephone magnetic field simulator). A 38.4-mm diameter coil spaced 16.5 mm
below a test surfaced driven by a specified test signal. Intended to simulate a telephone
handset receiver.
SPLITS
(Coupler SPL for an inductive telephone simulator). SPL developed in a 2cc coupler
by a hearing instrument with the gain control in the RTP (1996) or RTS (2003) when the
input is the magnetic field generated by a TMFS.
HFA (or SPA) –SPLITS
. Average of the SPLITS at HFA or SPA frequencies.
STS
(1996 - simulated telephone sensitivity) or
RSETS
(2003 - relative simulated
equivalent telephone sensitivity) is calculated as HFA (or SPA) SPLITS minus (RTG + 60). A
positive STS or RSETS indicates greater output when using the telephone than when using
the microphone.
ANSI telephone simulator (TMFS) test
ANSI S3.22 requires that the gain control be set to RTP (1996) or RTS (2003) before
running this test. The reference test gain (RTG) is required in order to calculate the STS
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Summary of Contents for RM500SL
Page 1: ...RM500SL User s Guide Version 3 4 March 2010...
Page 9: ...RM500SL User s Guide Version 3 4 June 2011 EC Declaration of Conformity 9...
Page 10: ...RM500SL User s Guide Version 3 4 June 2011 10...
Page 37: ...RM500SL User s Guide Version 3 4 June 2011 37...
Page 43: ...RM500SL User s Guide Version 3 4 June 2011 telecoil test 43...
Page 51: ...RM500SL User s Guide Version 3 4 June 2011 51...
Page 57: ...RM500SL User s Guide Version 3 4 June 2011 57...
Page 64: ...RM500SL User s Guide Version 3 4 June 2011 64...
Page 78: ...RM500SL User s Guide Version 3 4 June 2011 Screen tour unaided screen 78...
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