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									      SPECIAL FEATURES

               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.
        Technical specifications
         Maximum intensities
• 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
  is released.

  Increments: in the range from -10 dB to 110 dB (refer to max. intensities under
  Technical Specifications).

4.1 Tone
  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.
                                              Operation Cont’d
4.2 AIR
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.
                                       Operation Cont’d
4.3 Bone

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.

4.4 Pulse
By pushing the PULSE button a pulsing
tone with a modulation frequency of 2.5 Hz
is emitted.
                                     One more push turns off this modulation
                                     Operation Cont’d
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

4.5 Frequency
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
                                      Operation Cont’d
4.6 Masking
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
                                    masked channel
One more push on the ON/OFF button will disconnect the masking channel and
the two lamps will go off.
                                      Operation Cont’d
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
                                          Operation Cont’d
     4.8 Print
    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.
      4.9 Data
      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.
                                              Operation Mode
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
                        is pressed
  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
those frequencies.
                                                  setup mode 6
4.2.1 Setup
   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
memory function:
OFF: The audiometer will operate in the traditional mode.
AUTO: Automatic transfer of data to PC screen, each time sound level
is changed.
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”.

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