HP RM500SL manual Hide or Show HIT curves, To change the averaging frequencies

7.5Hide or Show HIT curves

On screens capable of showing more than one curve, you may show or hide test curves. Hiding a curve does not erase it.

To hide or show test curve(s):

1)Highlight, then <PICK> Curve [Hide/Show].

2)Highlight, then <PICK> the desired test curve to toggle between Hide or Show. The curve will toggle on or off when selected.

3)Press <Continue> to return to the test screen.

FastFacts 7.5: Hide or Show HIT curves

7.61996 or 2003 ANSI standard

Automated tests of linear and AGC hearing aids may be conducted according to either the ANSI S-3.22-1996 or ANSI S3.22-2003 test standards. For differences, see 8.2: ANSI S3.22-1996 facts and 8.3: ANSI S3.22-2003 facts.

To select the standard to be used:

1)Press <Setup>, then highlight and <PICK> [ANSI]

2)Highlight and <PICK> the version of the ANSI standard you wish to use.

3)Press <Continue> to exit

FastFacts 7.6: 1996 or 2003 ANSI standard

7.7ANSI test frequencies

The Frequencies feature allows hearing instruments to be evaluated at the Special Purpose Average (SPA) frequencies defined by ANSI S3.22, rather than the default High Frequency Average (HFA) frequencies. The choice of SPA (or HFA) frequencies influences the average OSPL90, average full-on gain, reference test gain, bandwidth and equivalent input noise. The frequencies at which distortion is measured are one-half the selected SPA frequencies. You can also select the frequencies at which attack and release times are measured.

To change the averaging frequencies:

1)Press <Setup>, then highlight and <PICK> [Frequencies].

2)Highlight and <PICK> the HFA/SPA frequencies box, to generate a drop-down list box of alternate test frequencies.

3)Highlight the desired HFA/SPA test frequencies and press <PICK> to select.

To change the frequencies for attack and release time measurements:

In the list of available frequencies, highlight and <PICK> the frequencies to be used to measure attack and release time.

Press <Continue> to exit.

FastFacts 7.7: ANSI test frequencies

0611 RM500SL User’s Guide Version 2.8 Page 32