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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 dierent 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 dierent frequencies, with the possibility of varying independently the
level of the two stimuli at a dierent 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 specic frequency. In this case it is possible to
investigate this specic 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 keys (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 (Dierence 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 xed intensity and frequency modulated with successive increases of intensity varying
from 0.1dB 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 xed 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 xed 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 (16), verify that the increment value is set on 1db or less. If this value
is higher only manual mode will be available for patient training purpose. A percentage of the correct given
answers will be available at the end of the sequence (SISI Score). To vary the increment size press F1; to vary
the frequency rate press F2.
Tone Decay test
This test evaluates the ability of the subject to perceive a stimuls for a determined length of time. The
subject receives an acoustic stimulus at a certain intensity and frequency for 60 sec. The subject must give
a response until he/she can hear the signal. It is possible to increase the intensity of the signal, with 5 dB
steps, from the moment the subject cannot hear it anymore. To increase the intensity of the stimulus during
the test use the channel 1 knob (4).
Stenger
With this test it is possible to send the same type of stimulus to both ears simultaneously. This test is used
to evaluate the masking eect of a signal sent to an ear when the opposite ear receives the same signal
but at a dierent intensity. In addition to the Pure Tones, it is possible to use the same input signals present
in speech audiometry (speech material from external players, from the operator’s microphone, from the
SD card present in the device). For this test it is not possible to visualize audiograms that were previously
stored.
Bekesy Automatic Audiometry Test
Test used to diagnose problems relative to the acoustic nerve.
The test is conducted in automatic mode with the subject’s collaboration. The subject has to give a
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