Weber - Interacoustics Affinity 2.0 Additional Information

5) Explain to the patient that they will now hear a series of tones. If suddenly one tone seems louder that
the other ones the response button should immediately be pushed.
6) Select the pref erred type of SISI test. Setting the system to 1 dB increments is the classical SISI. If the
patient can hear these increments and scores high, cochlea damage is likely. You may also choose 0
dB, 2 dB, or 5 dB increments.
If the patient does not manage to get a high score on the SISI test this could indicative of retro-
cochlear damage.
7) Start the test by pressing START. During the testing the f requency and intensity can be adjusted
manually (see illustration). The system will automatically count the number of reactions f rom the
patient. Note that the system needs 20 presentations to calculate a SISI score.
Press STOP to end the test.
8)
9) Save the SISI test by clicking Save

1.7.10 Weber

Originally the Weber test distinguished between conductive and sensorineural hearing loss through use of a
tuning f ork. The f ork was sof tly struck and placed in the middle of the patient's f orehead. If the patient heard
the tone better in the poorer ear the hearing loss was conductive, and if the tone was heard better in the
better ear the hearing loss was sensorineural at the given f requency. Today the Weber is most of ten
perf ormed using a bone conductor because the tuning f ork method only allows testing at one f requency
unless you have multiple tuning f orks. The bone conduction oscillator is placed in the midline and as a
stimulus is mostly a signal of 250, 500, and 1000 Hz chosen which should be clearly audible to the patient.
Using an audiometer together with a bone conductor to do the Weber is more reliable and f lexible than the
tuning f ork method and has theref ore become widespread.
Required items:
The Af f inity hardware
• 2.0
• The AC440 sof tware
A bone conductor (B81)
•
D-0004576-Q – 2022/05
Affinity/Equinox2.0 – Additional Information
Page 41