HP (Hewlett-Packard) RM500SL Manuel D’Utilisation
0611
RM500SL User’s Guide Version 2.8
Page 43
8.8
ANSI telecoil terminology
FastFacts 8.8: 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:
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).
the reference test position (1996) or reference test setting (2003).
See 8.2: ANSI
S3.22-1996 facts
and
8.3: 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.
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.
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.
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.