Operating Instructions MA 41
8100456_OI_MA41_EN_15a 14 8100456-8 04/15
5.1.1 Pure Tone Testing
During pure tone audiometry, the patient’s hearing threshold is measured.
Typically the threshold search begins with air conduction testing in the ear with
better hearing.
While viewing the tone screen the following settings will be displayed.
The default setting is the right channel set to air conduction pure tone and the
left channel is switched off. The frequency is automatically set at 1,000 Hz.
The audiometer provides one and a half channels, one for the test signal, and
the other for the masking signal. The test signal can be routed to the left, right,
or both ears. If masking is on, the masking signal is routed to the non-test ear.
Select the ear to be tested by pressing the functional selector button (9) on the
control panel underneath the screen. Press several times to toggle between
Right, Left and Both.
Next, select the transducer to be used, headphones (Phones), insert phones
(Insert), bone conductor (Bone), or sound field speaker (Speaker) by pressing
the appropriate button (10). Press the button several times until the LED
indicates the required transducer. Only calibrated transducers are available.
The level and frequency is displayed as a numerical value at the top of the screen
and is also indicated by the cursor within the audiogram.
The dB
HL
can be changed with the attenuator dials on both sides (1) of the
instrument.
Figure 5 - Pure Tone Audiometry Screen Example
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