Page 30 - Alpha Solway Catalogue

MEDIUM ATTENUATION N4
M2
HEARING PROTECTION SNR: 30dB SNR: 32dB HEARING PROTECTION

A lightweight ear defender featuring large, soft ear The N4 ear defender has a wire
cushions and a flexible padded headband. band that fits easily around the
neck making it ideal to wear with a
Fully adjustable to provide a comfortable fit for most safety helmet.
head sizes. HARD HAT
It offers greater performance COMPATIBLE
when compared to traditional
helmet-mounted ear defenders.
LIGHTWEIGHT WITH A SUPERIOR FIT
Stands out from alternatives for this level of SNR Soft ear cushions and an
adjustable head strap allow for a
secure, comfortable fit.

ATTENUATION DATA Attenuation (dB) 18.4 250 500 1000 2000 4000 8000 ATTENUATION DATA Frequency (Hz) 125 250 500 1000 2000 4000 8000
SNR = 32dB H = 35dB M = 30dB L = 22dB B.T.N
SNR = 30dB H = 36dB M = 30dB L = 22dB O.T.H
Frequency (Hz)
125
Mean
Mean
40.4
39.4
39.6
35.9
38.4
37.7
Attenuation
18.1
22.5
31.4
21.1
33.4
37.0
38.8
(dB)
Standard
Standard
1.8
1.8
3.2
3.2
2.4
2.6
2.3
3.7
2.9
3.3
2.7
2.9
3.1
2.3
Deviation (dB)
Assumed 14.8 19.6 31.2 36.4 36.4 36.5 38.0 Deviation (dB) 15.0 19.3 29.5 34.5 33.0 35.0 36.7
Assumed
Protection (dB) Protection (dB)
Fully adjustable with a thermoplastic SNR = 32dB H = 36dB M = 29dB L = 22dB O.T.H
F3 cushions, F3 ear defenders fold down
padded headband and soft ear
SNR: 32dB to a compact size for easy storage. Frequency (Hz) 125 250 500 1000 2000 4000 8000
Of durable construction and without ATTENUATION DATA
Mean
any metal parts, these are also ideal Attenuation (dB) 18.3 20.7 30.2 37.0 36.7 40.3 39.1
for petrochemical environments. Standard 2.9 1.5 2.5 2.9 2.0 3.2 2.7
METAL-FREE Deviation (dB)
Assumed
Protection (dB) 15.4 19.2 27.7 34.1 34.7 37.4 36.4
FOLDABLE

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