22
ARC-I-MARCI-2 MedRx AVANT ARC Installation Manual
Effective Date: 10-21-2016
Calibration values:
Calibration values:
Bone conductor
Radioear B71 Force: 4.9 ... 5.9 N
Mastoid placement – ANSI S3.13 coupler
Air Radiation
mean /maximum
RETFL dB re1 N
125=82.5
-
250=67.0
-
500=58.0
-
750=48.5
-
1000=42.5
-
1500=36.5
-
2000=31.0
-
3000=30.0
4/18
4000=35.5 -
6000=40.0
10.5/31
8000=40.0
-
Speech=55.0
Sound field (0 degree incidence)
Reference equivalent threshold sound
pressure level
RETSPL dB
125=22.1
250=11.4
500=4.4
750=2.4
1000=2.4
1500=2.4
2000=-1.3
3000=-5.8
4000=-5.4
6000=4.3
8000=12.6
Speech=14.5
Maximum Sound Levels:
Frequency
Inserts
Supra-aural
Sound Field
Bone Conduction
125
75
80
65
250
100
100
80
45
500
110
110
90
60
750
110
110
90
60
1000
115
120
90
70
1500
115
120
90
70
2000
115
120
90
70
3000
115
120
90
70
4000
115
120
90
60
6000
100
105
90
50
8000
90
100
80
45
Routine checking and subjective tests
The user of the instrument should perform a subjective instrument check once a week. The purpose of
routine checking is to ensure, as far as possible, that the equipment is working properly, that its calibration
has not noticeably altered and that its attachments, leads and accessories are free from any defect that
might adversely affect the test result.
Check that audiometer output is approximately correct on both air and bone conduction by sweeping
through at a hearing level of, for example, 10 dB or 15 dB and listening for “just audible” tones. This test
shall be performed at all appropriate frequencies and for both earphones as well as the bone vibrator.
Check at high level (e.g. hearing levels of 60 dB on air conduction and 40 dB on bone conduction) on all
appropriate functions (and on both earphones) at all frequencies used; listen for proper functioning,
absence of distortion, freedom from interrupter clicks, etc.
Listen at low levels for any sign of noise or hum, for unwanted sounds (break-through arising when a signal
is introduced in another channel) or for any change in tone quality as masking is introduced. Keep a record
the results.
