Proper Transducer Placement; Performing Tone Audiometry - otometrics madsen itera ii User Manual

9

Proper transducer placement

Headphones
1. Loosen the headband and place both the left and right side of the headphones simultaneously.
Note
• If the headphones are not placed properly, there is risk of causing the ear canal to collapse which will result in
elevated thresholds.
2. Aim the center of the headphones towards the patient's ear canals and gently place them against the ears.
3. Tighten the headband while holding the headphones in place with your thumbs.
4. Examine the placement of the headphones to make sure they are level, and properly positioned.
Insert Earphones
Young children tolerate insert earphones better than headphones.
1. Select the largest foam eartip that will fit into the patient's ear.
If the eartip is too small the sound will leak out and the dB level will not be accurate at the eardrum.
Insert earphones have greater attenuation between ears especially at the low frequencies; this reduces the need for
masking.
2. It is best to clip the insert earphone transducers behind the child or on the back of their clothing and then fit the
foam eartip into the child's ears.
Bone Oscillator
Note For unmasked bone thresholds, you can store binaural data by selecting Binaural bone in the routing section
•
of the control panel.
Mastoid placement
1. Move any hair covering the mastoid out of the way and place the flat round part of the bone oscillator securely on the
boniest portion of the mastoid without any part of the transducer touching the external ear.
2. Make sure the bone oscillator is tight on the mastoid but still comfortable.
3. If you are going to perform masking with earphones, position the other end of the bone oscillator headband over the
patient's temple on the opposite side of the head so that the headband of the earphones and bone oscillator fit on
the patient's head.
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Performing tone audiometry

For detailed examples of audiometric testing, see the MADSEN Itera II Reference Manual.
During online testing, the screen reflects the test done by the audiometer as it progresses.
Otometrics - MADSEN Itera II
9 Proper transducer placement
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