D-0100778 Rev C
107
Bone Vibrators - Pure Tone RETFL
Transducer
B71
B71
B81
B81
Impedance
50 Ω
50 Ω
10 Ω
10 Ω
Coupler
Mastoid
Forehead
Mastoid
Forehead
RETFL
RETFL
RETFL
RETFL
125 Hz
160 Hz
200 Hz
250 Hz
67
79
67
79
315 Hz
64
76.5
64
76.5
400 Hz
61
74.5
61
74.5
500 Hz
58
72
58
72
630 Hz
52.5
66
52.5
66
750 Hz
48.5
61.5
48.5
61.5
800 Hz
47
59
47
59
1000 Hz
42.5
51
42.5
51
1250 Hz
39
49
39
49
1500 Hz
36.5
47.5
36.5
47.5
1600 Hz
35.5
46.5
35.5
46.5
2000 Hz
31
42.5
31
42.5
2500 Hz
29.5
41.5
29.5
41.5
3000 Hz
30
42
30
42
3150 Hz
31
42.5
31
42.5
4000 Hz
35.5
43.5
35.5
43.5
5000 Hz
40
51
40
51
6000 Hz
40
51
40
51
6300 Hz
40
50
40
50
8000 Hz
40
50
40
50
9000 Hz
10000 Hz
11200 Hz
12000 Hz
12500 Hz
14000 Hz
16000 Hz
18000 Hz
20000 Hz
B71 / B81 uses ANSI S3.13 or IEC60318-6 2007 mechanical coupler and RETFL come from ANSI
S3.6 2010 and ISO 389-3 1994. Force 5.4N ±0.5N
