1H
Freq.Hz
125
250
C6
13.8
19.4
Mean.att.
C7
2.5
2.4
St.dev.
2H
Freq.Hz
125
250
C6
17.0
21.7
Mean.att.
C7
2.9
1.7
St.dev.
3H
Freq.Hz
125
250
C6
18.1
24.8
Mean.att.
C7
2.3
2.3
St.dev.
Michael & Associates, Inc., State College, PA, USA
Accredited by National Institute of Standards and Technology (NIST)
National Voluntary Laboratory Accreditation Program (NVLAP)
ANSI S-3.19-1974
500
1000
2000
3150
28.7
39.0
32.5
34.5
3.1
3.3
2.6
3.0
ANSI S-3.19-1974
500
1000
2000
3150
31.1
41.9
36.1
37.6
2.5
2.8
2.6
3.6
ANSI S-3.19-1974
500
1000
2000
3150
33.5
42.8
37.3
36.2
2.8
2.8
2.8
2.1
Headband
C1
C4
, Weight:
4000
6300
8000
NRR
34.6
36.5
35.7
23dB
2.7
2.4
3.1
C4
, Weight:
C5
4000
6300
8000
NRR
37.0
38.8
38.8
26dB
4.1
2.5
3.9
C4
, Weight:
4000
6300
8000
NRR
38.0
39.0
38.9
28dB
3.3
1.8
2.4
C9
C5
8.00 oz
CSA
B
8.74 oz
CSA
A
C5
9.77 oz
CSA
A