Datasheet

ManualsBrands3M PELTOR ManualsEar ProtectionOptime I Over-the-Head Earmuffs

Attenuation values

Frequency

(Hz)

63 125 250 500 1000 2000 4000 8000

Mf (dB) 20.1 17.1 24.5 34.8 40.2 39.6 46.7 43.1

sf (dB) 3.3 2.3 2.8 2.2 2.0 1.8 4.2 2.5

APVf (dB) 16.8 14.8 21.7 32.6 38.2 37.8 42.5 40.6

SNR = 34 dB H = 40 dB M = 32 dB L = 22 dB

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PELTOR

™

Optime

™

III Earmuffs (H540P3 helmet mounted)

Frequency

(Hz)

63 125 250 500 1000 2000 4000 8000

Mf (dB) 20.9 17.5 24.5 34.5 41.4 39.5 47.3 42.0

sf (dB) 3.3 2.3 2.7 2.0 2.2 2.0 4.4 2.8

APVf (dB) 17.6 15.2 21.8 32.5 39.2 37.5 42.9 39.2

SNR = 35dB H = 40dB M = 32dB L = 23dB

™

PELTOR

™

Optime

™

III Earmuffs (H540B neckband)

Attenuation table key:

f = Test frequency

APVf = Assumed Protection Value

Mf = Mean attenuation value

sf = Standard deviation

H = High-frequency attenuation value (predicted noise level reduction for noise with LC – LA = -2dB)

M = Medium-frequency attenuation value (predicted noise level reduction for noise with LC – LA = +2dB)

L = Low-frequency attenuation value (predicted noise level reduction for noise with LC – LA = +10dB)

SNR = Single Number Rating (the value that is subtracted from the measured C-weighted sound pressure level, LC in order toestimate the

effective A-weighted sound pressure level inside the ear).

Important notice

The use of the 3M product described within this document assumes that the user has previous experience of this type of product andthat it will be used by a competent professional. Before

anyuse of this product it is recommended to complete some trials tovalidate≈theperformance of the product within its expected application. All information and specification details contained

within this document are inherent to this specific 3M product and would not be appliedtoother products or environment. Any action or usage of this product made in violation of this document

is at the risk of the user. Compliance to the information and specification relative to the 3M product contained within this document does not exempt the user fromcompliance with additional

guidelines (safety rules,procedures). Compliance to operational requirements especially in respect to the environment and usage of tools with this product must be observed. The3M group

(which cannot verify or control those elements) would not be held responsible for the consequences of any violation of these rules which remain external to its decision and control. Warranty

conditions for 3M products are determined with the sales contract documents and with the mandatory and applicable clause, excluding any other warranty or compensation.

Personal Safety Division

3M United Kingdom PLC

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Cain Road, Bracknell

Berkshire RG12 8HT

t: 0870 60 800 60

www.3M.eu/PPEsafety