Serial- & parallel port.
Very readable displays.
Noise free push buttons.
3 fully automatic threshold tests.
Storage capacity: 29 audiograms.
Calibration without entering the cabinet.
Automatic printout of complete audiogram.
Narrow band masking. Intensity up to 100 dB.
Option of visualizing the audiogram during the test.
• Frequencies: 11 fixed frequencies from
125 Hz to 8000 Hz.
• Hearing Level Range: -10 dB to 110 dB in
5 dB steps.
Description of front panel
Description of front panel Cont’d
1 Iso hearing level - The actual sound 8 Tone attenuator - Push the
pressure in dB DOWN/UP to change soundlevel
2 Frequency - The actual frequency in Hz 9 Tone - Sends tone to the patient
3 Audiogram Identification - The active
audiogram 10 AIR - Determines whether the tone is
Masking level dB - The actual masking going to the right or left ear
4 Print - Print the active audiogram 11 Bone - Determines whether the bone
Data – Transmits the test results to a conductor is placed at the left or right
connected PC side
5 Aut. - Starts 1 of 3 possible tests 12 Frequency - Pushing one of the
buttons changes the frequency to the
Setup - Enters the setup function (11 next fixed value
13 Masking - Masking on/off
6 Shift - Select the “RED” functions
14 Audiogram Identification - Push
7 Clear - Erase audiogram one of the buttons to select which
Pulse - Initiates pulse tone at 2.5 Hz audiogram to be active
Masking attenuator - Push the
DOWN/UP to change masking level
Description of back panel
1 Right - Right earphone
2 Left - Left earphone
3 Bone - Bone conductor
4 Response - Patient answer
5 Serial - Connection for PC, or serial printer
6 Printer - Connection for parallel printer
7 On/off - Device on/off
8 Power - Power connector
4.0 Tone attenuator
By applying light pressure to the
DOWN/UP buttons the attenuator steps up
or down in 5 dB.
The actual sound pressure can be read in the display
Holding down one of the buttons, the sound
pressure is increased or decreased until the button
Increments: in the range from -10 dB to 110 dB (refer to max. intensities under
When the attenuator is in its lowest position - one step below -10 dB - the display will
show minus (-). In this position no data will be stored in memory and should a printout
be performed no values will be shown for those frequencies. The first push on the UP
button will set the attenuator to 20 dB. If it is decided to store the threshold values
shown in the display (see SETUP, MODE 3), it is important not to activate the two
attenuator keys before printout, unless a correction of sound pressure is desired.
If you want to erase data in an audiogram, which already contains old data: press CLEAR.
With the interrupter button a tone is
delivered to the patient.
The light will shine as
long as the tone is
It is possible to select fixed tone duration of 0.5, 1.0 or 1.5 seconds. This
means that independently of how long the interrupter button is depressed the
selected tone duration remains unchanged (see SETUP, MODE 2).
The output button AIR determines whether When the L (left) lamp
the tone is going to the right or left ear. is on, the tone is sent
to the left ear.
For each touch of the AIR key, ears are changed.
The output button BONE If the bone conductor is
determines whether the tone placed on the left side,
is going to the bone the L lamp must be
conductor. turned on.
The masking channel is automatically connected to the opposite ear and the
corresponding light will flash as long as masking is selected. By pressing the
BONE button, the bone conductor is connected. For each push of the
button, left and right sides are changed.
By pushing the PULSE button a pulsing
tone with a modulation frequency of 2.5 Hz
One more push turns off this modulation
Following symbols will be shown on the screen:
X : left ear
O : right ear
] : bone conductor left ear
[ : bone conductor right ear
• masking left ear
D : masking right ear
> : bone conductor + masking left ear
< : bone conductor + masking right ear
Pushing one of the buttons changes
the frequency to the next fixed
The actual frequency can be read in the display
Holding one of the buttons down the frequencies is repeatedly changed to
lower (DOWN) or higher (UP) values
until the key is released
The masking noise used is Narrow Band Noise - effective masking - which
automatically follows the frequency of the tone and which automatically is
connected to the opposite ear.
Pushing the ON/OFF The lamp above
button turns on the the button lights
masking channel. up.
At the same time the lamp above the AIR
button will flash with short intervals for the
One more push on the ON/OFF button will disconnect the masking channel and
the two lamps will go off.
By applying light pressure on the If one of the buttons is held
DOWN/UP buttons adjusts the down the intensity is
attenuator in steps of 5 dB in the automatically adjusted until
range from 0 dB to 100 dB. the buttons are released.
It is possible to connect the two attenuators in such a way that the masking
attenuator - which can be adjusted separately - automatically, follows the tone
4.7 Audiogram ID
Use the SHIFT + ID DOWN/UP The number is shown in
buttons, to go through the the ID display
audiograms or find one specific
Use the SHIFT + PRINT The light above the button will light up
buttons to print the active during the printing, and the program
audiogram to a connected automatically selects the correct symbols.
printer. If the printer is not connected or shows an
error (e.g. out of paper), the light turns off
after a couple of seconds.
You may connect most 9 or 24 pin printers or any Epson compatible Bubble Jet
printer; in addition you may use a laser printer or a DeskJet printer both in HP
emulation mode or an IBM pro-printer.
A push on the DATA button causes the device to
transmit the test results stored in the active
audiogram to a connected PC.
The duration of transmission is about 200 milliseconds. Is a computer connected
during the test, the audiogram may be shown directly on the screen: Every push on
the DATA buttons will update the results. The software program automatically, selects
the correct symbols for left, and right ear as well as for bone and masking.
Variable automatic test (VARI selected in setup mode 6)
AUT. button is pushed,
The frequency is set to 125 Hz and a tone is automatically
given to the left ear at an intensity of 30 dB.
the intensity will increase 10 dB each time the tone is
presented, until the patient signal button
When the software program has accepted the answer, the frequency is
automatically changed to the next level and the procedure is repeated until
all frequencies have been tested for both the left and the right ear.
When the test is completed, the audiometer gives 1 BEEP. If some of the
frequencies have not been heard, the lamp above the AUT. button will flash.
Press the AUT. button and check the frequencies. The attenuator display
will flash for the frequencies not heard. It is possible to conduct a manual test for
setup mode 6
To enter the SETUP function, push the SETUP button - the RESPONSE
light will flash 5 times and then stay on constant as long as SETUP is
active. With the masking attenuator keys it is possible to select 10 different
MODES which can be programmed individually. The MODE selected is
shown on the masking display.
This mode gives the option of selecting or deselecting single frequencies
by means of the tone attenuator. One press on the UP button selects the
frequency and the TONE lamp will light up. On the other hand, pushing
the down button will deselect the frequency and the lamp will be off. The
deselected frequencies are not shown in the display after setup is finished.
setup mode 6
In this mode fixed tone duration of 0.5, 1.0 and 1.5 seconds may be
chosen. The individual tone duration is selected with the tone attenuator
buttons and is shown in the frequency display as: OFF, 0.5, 1.0 or 1.5.
The fixed tone durations are not affected by the length of time the
interrupt button is depressed. If OFF is selected the tone length is
controlled manually by pressing the TONE button.
setup mode 6
This determines if the test values are stored in the memory. When the
UP button of the tone attenuator is pressed
the FREQUENCY display may show three values:
ON: The memory is active, and all test data are stored for the left and
right ear, as well as for the bone conductor
& masking. One push of the DOWN button will disconnect the
OFF: The audiometer will operate in the traditional mode.
AUTO: Automatic transfer of data to PC screen, each time sound level
Mode 3 has to be selected if an automatic threshold test is performed.
setup mode 6
By means of the tone attenuator, the tone and masking signal may be
turned off when frequency and channels are changed. When the UP
button is pressed the TONE lamp lights up and the signal is
automatically turned off each time frequency and channels are changed.
One push of the DOWN button will erase this function and the signal
will stay on when frequency or channel is changed.
In this mode it is possible to connect the masking attenuator to the tone
attenuator. One push of the UP button of the tone attenuator connects the two
attenuators together and the FREQUENCY display says ON. The masking
attenuator may still be adjusted individually in this function. One push of the
DOWN button will cancel the function and FREQUENCY display will write: OFF.
setup mode 6
You may perform one of the three automatic tests:
20 dB test (20) RANDOM 20 dB test (20r)
Variable test (VARI)
By pressing the TONE ATTENUATOR UP/DOWN you may choose
between these three automatic tests, which
are described above.
setup mode 6
You have several options choosing printer, and by means of the tone
attenuator buttons, a 9 pin or 24 pin printer, an IBM Pro-printer or an
HP laserprinter is selected. The type of printer is shown in the
frequency display. If an Epson compatible Bubble Jet printer is
connected you should select “24”. Using a laser printer or a DeskJet
printer in HP emulation mode you should choose “HP”. The IBM Pro-
printer is shown as “Pro”.