GSI AudioStar Pro™ Clinical Audiometer
88
D-0100778 Rev C
earphones are at fault and should be replaced. In any case, the audiometer should
be scheduled for immediate maintenance.
Speech Level Check
To check the speech level with recorded speech, select the Speech test type
button. Place the earphones on a person with normal hearing and present a word
list at 40 dB. If intelligible speech is not heard, with the Channel 1 Hearing Level
control set at 40 dB or less, the audiometer should be scheduled for technical
service.
Internal Controls Check
Should the front panel controls lock into one state and it is not possible to change
any of the parameters, turn off the power. Wait one minute and then power on.
Bone Vibrator Check
This check must be performed in a quiet environment or in a sound room. With
the frequency set to 2,000 Hz, the Channel 1 intensity set at 40 dB HL and the
bone vibrator positioned properly, the tone should be clearly audible to a person
with normal hearing – less than 25 dB. When a bone vibrator fails this test, the
calibration should be verified.
Masking Level Check
Select the Tone test type. Ensure the stimulus is narrow band noise on Channel 2.
Activate the Channel 2 Interrupt button and listen for a smooth, even hiss.
Talk Forward Check
Speech should be clearly audible (in the earphones) when spoken in a normal
tone with the Talk Forward dB HL control set at 45 dB HL.
Cleaning the System
Turn
OFF
the system and disconnect power before cleaning the instrument. Use
a soft cloth lightly dampened with cleaning solution to clean all exposed
surfaces. Take care to not allow liquid to come in contact with the metal parts
inside the transducers (e.g., earphones / headphone). Do not permit solutions or
Disinfecting agents to seep into the electronic portions of the system. Take
special care around controls, connectors and panel edges. Remove any dust from
the exterior of the system with a soft brush or cloth. Use a brush to dislodge any
dirt on or around the connectors and panel edges. Remove stubborn dirt with a
soft cloth slightly dampened with mild detergent and water. Wipe surfaces dry
afterward. Do not use instrument or transducers until they are completely dry.
