Resonance R25C Manuel D'utilisation page 47

material genre (e.g. two-syllable words for Italian), the language and the list. To start the test, press the PLAY
(5) softkey. During the test, correct replies can be entered either using the arrow keys or by pressing on the
ENTER (5) softkey. If this last option is used, an indicator will also be displayed alongside the corresponding
word in the list being run. While the test is being run, it is also possible:
- to repeat transmission of a phoneme that has just been transmitted (via the REPEAT softkey)
–to go into test pause mode (via the PAUSE softkey),
–to change the time interval between phonemes (via the TIME+ and TIME– softkey)
–to interrupt the test by pressing on the STOP (5) softkey.
The phonemes conveyed to the patient shall be shown on display individually. It is also possible for the
operator to listen to them either via the monitor-headset or via the built-in monitor-speakers.
Pressing F2 softkey is possible to store the SRT value for the active output.
Auto-threshold Test (Hugson-Westlake Auto-threshold)
The automatic threshold test is started either by pressing on the START/STOP (19) key or by pressing on
the START (5) softkey. To interrupt the autothreshold test being run, either press on the START/STOP (19)
key or press on the STOP (5) softkey. Threshold readings for each frequency shall depend on the response
given by the patient via the patient response pushbutton that is connected via the connector (33) on the
unit's back panel. The patient will have to keep the button pressed when he hears the stimulus and release
it when he no longer hears the stimulus.
Test ABLB (Alternated Binaural Loudness Balance or Fowler Test)
The test is carried out only using AC headsets alternating the same acoustic stimulus (only in pure tones)
between the two ears (right and left) ,with the possibility of varying independently the level of the stimulus
sent to the two ears. It is possible to change the presentation rate of the stimulus by pressing F2. It is
possible to carry out the test for four different stimulation frequencies for each ear, each one will occupy a
"Frame" on the exam window. To change the working frame after changing the frequency, press F1.
Test MLB (Alternated Monoaural Loudness Balance or Reger Test)
The test is carried out only using AC headsets sending to a single ear (right or left) alternatly two acoustic
stimuli (only in pure tones) at two different frequencies, with the possibility of varying independently the
level of the two stimuli at a different frequency. To vary the tone of the reference frequency use FREQUENCY
(13) keys; to vary the tone of the variable frequency use the left and right arrowhead buttons (10). Frame
and stimuli presentation rate management is done as seen before for the ABLB test.
Multifrequency Audiometry
This test is useful if the audiogram shows an hearing loss at a specific frequency. In this case it is possible to
investigate this specific frequency with intervals ranging from 1 Hz to 100 Hz. Concerning the commands,
the test is similar to the tonal audiometry test seen before (INPUT, OUTPUT, SIDE, etc...). To change the
basal frequency with normalized steps, also used in tonal audiometry, use the FREQUENCY button (13). To
vary the frequency around the basal frequency in preset increasing steps, use the arrowhead buttons left/
right (10). The frequency increase steps can be set using the up/down buttons (10).
Test DLI (Difference Limen for Intensity) or Luscher Test
DLI allows evaluating the subject's ability to detect small short intensity increments. The subject receives
a pure tone at a fixed intensity and frequency modulated with successive increases of intensity varying
from 0.1 dB to 5 dB with a presentation frequency varying from 0.5 Hz to 2 Hz. To vary the intensity of the
increments press F1. To vary the presentation frequency of the increments press F2.
SISI test (Short Increment Sensitivity Index or Jerger Test)
A test similar to DLI in which the subject receives a pure tone at a fixed intensity and frequency, modulated
with successive increases of intensity variable from 0.25 dB to 5 dB with a presentation frequency varying
from 0.2 Hz to 0.5 Hz or random with fixed durations of 200 msec. The subject receives 20 stimulus increases
for each frequency and is required to give an answer when he/she can identify an increase. To start the test
in automatic mode, press START/STOP (19), verify that the increment value is set on 1db or less. If this value
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