HP Omni 200-5000 Guia do Utilizador descarregar pdf (Página 45)

RM500SL

User's Guide Version 3.12



March 2015

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 (1996) or RSETS (2003). The easiest way to

meet both requirements is to run a [Linear] or [AGC] test before running this test. See ANSI 1996 Linear and

AGC tests; ANSI 2003 Linear and AGC tests

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HP Omni 200-5000 Guia do Utilizador Página 45