HEARING PROTECTION
HEARING PROTECTION
EP7 Sonic Defenders
®
Ultra
Two Levels of Protection Against Two Types of Noise
Filtered EP7 Sonic Defenders
Ultra provide two levels of protection—
with their attached filter caps in or out—against two types of noise:
continuous noise (example: loud roar of an engine) and impulse noise
(example: gunshot). With the filter caps out of the noise-reducing
filters, loud potentially dangerous sounds (above 85dB) are lowered
while safe-level ambient sounds and conversations are allowed to
pass through and be heard. With the filter caps inserted, additional
hearing protection is afforded and ambient sounds and conversations
are blocked.
FOR PROTECTION WITH THE ABILITY TO HEAR AMBIENT SOUNDS,
leave filter caps out, or pry out with your fingernail if already inserted.
FOR MAXIMUM
PROTECTION OR SITUATIONS WHERE YOU DON’T WANT TO HEAR AMBIENT
SOUNDS,
insert filter caps into filter holes and push in until snug.
NOISE ATTENUATION DATA
WARNING:
Improper fit of this device will reduce its effectiveness in attenuating noise.
Follow instructions for proper fit. Failure to follow instructions could result in hearing loss
and/or injury. EP7 Sonic Defenders
Ultra fit most people; however, no hearing protection
fits everyone. If proper fit cannot be achieved following instructions, discontinue use. Do
not use in environments with extreme air pressure or where abrupt pressure changes
occur. Foam-tipped EP7s should NOT be worn for swimming. For swimming use, we
recommend polymer flange-stemmed Sonic Defenders models.
EP7 Sonic Defenders Ultra -
FILTER CAPS OUT
NOISE REDUCTION RATING (NRR)
EP7 Sonic Defenders Ultra -
FILTER CAPS IN
14
NRR
Test Frequencies (Hz)
Mean Attenuation (dB)
Standard Deviation (dB)
125
9.5
4.2
250
10.6
3.1
500
18.7
3.5
1000
26.9
3.6
2000
34.6
4.1
3150
34.3
2.6
4000
30.8
4.4
8000
41.1
2.9
6300
36.1
4.3
28
NRR
Test Frequencies (Hz)
Mean Attenuation (dB)
Standard Deviation (dB)
125
31.3
3.7
250
29.8
2.9
500
35.9
3.6
1000
36.3
3.6
2000
38.1
2.8
3150
40.1
4.2
4000
34.8
3.5
8000
41.3
4.4
6300
38.5
4.8
EP7 Sonic Defenders
®
Ultra
14
(when used as directed)
EP7 Sonic Defenders
®
Ultra
28
(when used as directed)
WITH FILTER CAPS OUT
WITH FILTER CAPS IN
Average Peak Impulse Level
dB Reduction
Average Peak Impulse Level
dB Reduction
132 dB Overall Average PIL
150 dB Overall Average PIL
168 dB Overall Average PIL
24.5
29.3
32.1
132 dB Overall Average PIL
150 dB Overall Average PIL
168 dB Overall Average PIL
41.8
45.3
44.9
NOISE REDUC
TION (
dB)
EP7 Impulse Noise Reduction—
Filter Caps Out
ANSI S12.42-2010
45
40
35
30
25
20
15
10
5
0
132
150
168
IMPULSE NOISE LEVEL (dB)
Average Peak Impulse Level
dB Reduction
Average Peak Impulse Level
dB Reduction
132 dB Overall Average PIL
150 dB Overall Average PIL
168 dB Overall Average PIL
24.5
29.3
32.1
132 dB Overall Average PIL
150 dB Overall Average PIL
168 dB Overall Average PIL
41.8
45.3
44.9
ANSI S12.42-2010
NOISE REDUC
TION (
dB)
EP7 Impulse Noise Reduction—
Filter Caps In
50
45
40
35
30
25
20
15
10
5
0
132
150
168
IMPULSE NOISE LEVEL (dB)