otometrics AURICAL Aud, Reference Manual

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Eartips for Insert Earphones
Warning
•
To prevent cross-infection, use new eartips when you test the next client.
The eartips are disposable and therefore should not be cleaned or re-used. There are no special requirements for the dis-
posal of the eartips.
Bone oscillator
Clean the bone oscillator between patients, e.g. with a non-alcohol based antibacterial wipe, such as Audiowipes.
10.4 Calibration
Annual calibration
The audiometer, headphones, bone oscillators, and sound field speakers must be calibrated once a year by your authorized
service department.
The audiometer is dispatched from the factory together with a Test Report (Calibration Certificate). The Test Report spe-
cifies the transducers that have been calibrated (i.e., those which have been supplied together with the instrument),
according to which standards, and the equipment used for calibration. Results are listed for each transducer at all standard
frequencies.
In general, the instrument is calibrated in dB HL and dB masking level using the stated reference equivalent thresholds; dB
HL is related to sound pressure levels, dB SPL = dB re 20
µ
Pa, and force levels (dB re 1
µ
N).
Caution
•
Note that calibration has been performed only on the transducers supplied! If you wish to use any other
transducer for testing with the device, please contact your local distributor first.
112 Otometrics - AURICAL Aud
10 Maintenance and calibration