Welch Allyn TM 262 Auto Tymp - User Manual - Manual (Page 44)

TM 262
3-10 Revised 4/11/08
Audiometry testing information
Prior to testing, ensure that the earphone cords are plugged into their appropriate connectors on
the rear panel of the instrument. Select the desired tone type (i.e., pulsed, steady, or FM).
Always handle earphones with care. Neither drop them nor permit
them to be squeezed together. Severe mechanical shock may change their operating
characteristics and require their replacement. Insert the earphone cords between the
ear-phone cushions during storage to prevent damage from mechanical shock.
Instructing the patient/subject
You should put the patient/subject as much at ease as possible before the test begins. In
addition, it is important to try to make them understand how the test is to be conducted and
what they will hear. For sake of uniformity, an unvarying explanation is advisable, for example:
“I am going to place these earphones over your ears. You will hear a variety of tones - some
high, some low, some loud, and some very soft. Whenever you hear, or think you hear one of
these sounds raise your hand. Lower your hand when you no longer hear the sound.”
“Remember that although some of the tones will be easy to hear, others will be very faint.
Therefore, you should listen very carefully and raise your hand whenever you think you hear
the tone.”
NOTE: Modify the instructions accordingly if the optional handswitch is to be used.
Placement of earphones
The most important thing to remember is that a good seal is required between the earphone
cushion and the patient’s/subject’s head and ears. To increase the likelihood of a good seal:
a. Eliminate all obstruction between the earphones and the ears e.g., hair, eyeglasses,
earrings, hearing aids, etc.
b. Adjust the headband so that it rests solidly on the crown of the subject’s head and
exerts firm pressure on both ears.
c. Center the earphones carefully over both ears. The earphone with the red connector
goes on the right ear. Take care to eliminate any visible gaps between the earphone
cushions and portions of the individual’s head and the ear on which the cushion rests.
Response handswitch (optional accessory)
If the optional handswitch is to be used, be sure that the handswitch connector is properly
inserted into the jack on the rear panel. The instrument will display an appropriate symbol
whenever the handswitch is operated.
CAUTION
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