HP RM500SL manual FastFacts 16.6 Rear measurement procedure

16.6 REAR measurement procedure

1)Press <Tests>, then highlight and <PICK> [Insertion gain] from the REM list

2)Referring to 10: Real-Ear Measurement Setup and 11: REM Screen Setup, prepare the system, position the patient and insert the probe tube. (For tight- fitting hearing aids or earmolds, the probe tube may be inserted through a vent.)

3)Without disturbing the probe tube, insert the hearing instrument or earmold.

4)Referring to 16.4: Audiometric data entry, enter threshold data.

5)Highlight and <PICK> button 1, 2, or 3 in the REAR/REIG column. This will present a signal from the REM speaker and display the REAR Setup box.

6)Highlight and <PICK> [Stimulus], then highlight and <PICK> [Pink noise] or [Swept]. Use pink noise when using the NAL-NL1 fitting formula. Use Swept when testing maximum output capabilities.

7)Highlight and <PICK> [Level], then highlight and <PICK> a stimulus level from the list box. Use the level shown on the target REIG curves. If no level is shown, use the lowest level required to overcome background noise.

8)Adjust the hearing instrument so that the REIG curve (SPL scale) or Aided threshold curve (HL scale) approximates the dotted target curve. For multi-level targets, match each curve using the stimulus level indicated.

9)Press <Continue> to complete the test and capture the data.

See 16.2: Insertion gain in SPL and 16.3: Insertion gain in HL for an explanation of screen curves. See 16.7:SII calculation in Insertion gain

NOTE: Because it is analyzed in 1/3 octave bands, the Noise stimulus produces a REAR up to 12 dB below that produced by the Swept stimulus at the same overall level. The REIGs will be similar except at levels which cause non-linear operation of the hearing instrument.

FastFacts 16.6: REAR measurement procedure

0611 RM500SL User’s Guide Version 2.8 Page 68