HP RM500SL manual FastFacts 16.5 Reur measurement procedure

16.5 REUR measurement procedure

Performing a REUR test erases all existing REAR and REIG data for the current test ear. REUR should be measured only if Transducer = Soundfield. Otherwise it is more accurate to use average. See 16.4: Audiometric data entry.

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.

3)If REUR is set to Average, highlight and <PICK> [Audiometry] then highlight and <PICK> [REUR] to toggle to [Measure]. Press <Continue> to advance to the Threshold entry poster. You may enter threshold data at this time (see 16.4: Audiometric data entry) or press <Continue> to proceed with the measurement.

4)Highlight and <PICK> REUR (below REAR/REIG test 3).

5)Press <Continue> to accept the default 55 dB SPL Pink noise stimulus and capture the REUR curve OR highlight and <PICK> [Stimulus] and [Level] to select other values. These choices have no impact on the resulting REIG.

6)If there is a notch in the 4000 to 8000 Hz region, try advancing the probe tube 2 mm and repeating step 3. If the notch moves to a higher frequency, repeat this step until the notch moves beyond the highest frequency of interest.

Because it is analyzed in 1/3 octave bands, the Noise stimulus produces a REUR 12 dB below that produced by the Swept stimulus at the same overall level.

The Average REUR used is shown at right. Measured REUR will vary from this.

For small children the peak may shift to the right and become sharper. Drainage tubes and perforated ear drums will cause large differences - usually around 1 kHz.

FastFacts 16.5: REUR measurement procedure

0611 RM500SL User’s Guide Version 2.8 Page 67