MedRx Avant - Page 12

D-0123003-B 05/2019
12
NOTE: If the threshold at 2000 Hz is more than 20 dB different (less than or
greater than) the threshold at 1000 Hz, repeat steps 5 through 8 at 1500
Hz
(the “half octave” between 1000 Hz and 2000 Hz).
11. Repeat steps 5 through 8 for 4000 Hz, 8000 Hz, 500 Hz and 250 Hz.
12. Repeat steps 5 through 11 in the opposite ear.
NOTE: The software automatically calculates the 3-frequency Pure Tone
Average (PTA) which is displayed above and inside the legend as
follows:
Pure Tone Audiometry via the Bone Conductor
1. Following the instructions on page 9, place the Bone Conductor on the mastoid
process behind the ear with better air conduction thresholds as measured above.
If the thresholds are equal, place the Bone Conductor on the mastoid process
behind the right ear.
2. Establish bone conduction thresholds as described above (see page 11, steps 5-8)
for 1000 Hz, 2000 Hz, 4000 Hz, 500 Hz and 250 Hz.
3. If the Bone Conduction (BC) threshold at a given frequency is less (better) than the
Air Conduction (AC) threshold by 15 dB or more, you must confirm the threshold
by performing masking.