3M PELTOR Headset MT7H79A Série Mode D'emploi page 7

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LABORATORY ATTENUATION
Explanation of the attenuation data tables
(A) EN 352-1:2002 / EN 352-6:2002
A:1 Frequency (Hz)
A:2 Mean attenuation (dB)
A:3 Standard deviation (dB)
A:4 Assumed protection value, APV (dB)
H = Hearing protection estimation for high frequency sounds
(ƒ ≥ 2000Hz).
M = Hearing protection estimation for medium frequency
sounds (500Hz < ƒ < 2000Hz).
L = Hearing protection estimation for Low frequency sounds
(ƒ ≤ 500Hz).
(B) ANSI S3.19-1974
B:1 Test Frequency (Hz)
B:2 Mean Attenuation (dB)
B:3 Standard Deviation (dB)
The level of noise entering a person's ear, when hearing
protector is worn as directed, is closely approximated by the
difference between the A-weighted environmental noise level
and the NRR.
Example
1. The environmental noise level as measured at the ear is
92 dBA.
2. The NRR is 21 decibels (dB).
3. The level of noise entering the ear is approximately equal
to 71 dB(A).
CAUTION: For noise environments dominated by frequencies
below 500 Hz the C-weighted environmental noise level
should be used.
(C) AS/NZS 1270:2002
C:1 Test Frequency
C:2 Mean Attenuation
C:3 Standard Deviation
C:4 Mean minus SD
(D) Compatible Industrial Safety Helmets
These earmuffs should be fitted to, and used only with, the
industrial safety helmets listed in Table D. These earmuffs
were tested in combination with the following industrial safety
helmets, and may give different levels of protection if fitted to
different helmets.
Explanation of the industrial safety helmet attachment table:
D:1 Helmet manufacturer
D:2 Helmet model
D:3 Helmet attachment
D:4 Head size: S = small, M = medium, L = large
(E) External Audio Input Levels
Table E lists the various types of PELTOR headset speakers
and the corresponding voltage level that generates a sound
pressure level of 82 dB(A) in the headset. To identify the
speaker model in your headset, remove the hygiene kit
compare the speaker to the pictures and colors described in
Table E.
E:1 Model, color ( grey
E:2 The voltage input that generates 82 dB(A)
(F) COMPONENTS
F:1 Headband (PVC or leather)
F:2 Headband wire (stainless steel)
F:3 Two-point fasteners (POM)
F:4 Connection cord with Nexus TP-120 plug (PUR)
F:5 Speech microphone (PUR)
F:6 Ear cushion (PVC foil, PUR foam)
F:7 Push-to-talk button (only some models)
F:8 Cup
F:9 Foldable headband (stainless steel, TPE or leather)
F:10 Neckband (stainless steel, PO)
F:11 Helmet attachment (stainless steel, POM)
F:8
F:7
F:6 F:5
F:9
F:10
2
black blue)
F:1
F:2
F:3
F:4
F:11