otometrics MADSEN Midimate 622, Руководство пользователя

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4. Switch on the instrument.
5. After the power-up test has been completed, the audiometer will
automatically access User Test 1. Proceed with this preprogrammed
test if suitable or press
MENU to access any other suitable User Test or
press MENU again to access the Select Function Menu and set up your
own test as described in 4. Test Setup. Output may be Air, Bone or even
Free Field but
Tape (CD) must always be selected as input.
MENU
6 . Start playback unit with calibration signal and adjust input level by
pressing the appropriate
TAPE pushbutton and turning one of the rotary
knobs so that the stimulus level on the Stimulus LED deflects to O VU.
See 5.1.3 on pages 22 and 23 for a more detailed description.
TAPE 1/2
7. Place the patient in sound cabin facing away from the audiometer.
8. Instruct the patient to repeat the words he hears and test each ear in turn
(using L/R Shift ).
L/R SHIFT
Refer to section 7.4 for further details on testing with prerecorded signals.
5.3.4 FREE-FIELD SPEECH AUDIOMETRY
Free-field testing is often employed in speech audiometry when testing
children as many children dislike wearing headphones. Testing for threshold
or speech discrimination is as described above for live voice and tape/CD
except for the following:
!
A pair of (optional) power amplifiers and loudspeakers must be con-
nected to the sockets marked FF Left and Right on the rear panel and set
up in the sound cabin so that the stimulus channel faces the left ear and
the masking channel faces the right.
!
F.F. must be selected as output from the following display:
(Speech) Output ? :
Air Bone F.F.
Please refer to section 7.6 for further details on free-field testing in speech
audiometry.
5.4 SPECIAL TESTS
The MIDIMATE 622 Diagnostic Audiometer is capable of performing the
following special tests:
!
Short Increment Sensitivity Index (S.I.S.I Test)
!
Fowler's Alternate Binaural Loudness Balance Test
!
Stenger Test
MIDIMATE 622 OPERATION MANUAL 5. Operating in Test Mode
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