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3
1450 Ear Muffs
Data Sheet
Features
•
Unique spring design enables equal tension regardless of head
sizes.
•
Can be worn in 3 distinct positions: working, resting, parking
•
Designed to avoid echo noise problems in resting position
•
2-point mounting system for better pressure distribution and
easy manipulation
•
Unique injection moulded inserts for optimal attenuation
•
weight: 218g.
Applications
The 3M 1450 ear muffs can be used in many industries where
damaging noise is present and head protection is required, such
as:
•
Metal industry
• Construction
•
Aircraft
• Power plants
•
Utilities
The 1450 ear muffs are especially recommended for intermittent
wear.
Approvals
•
Meets the performance requirements of the European Standard
EN 352-3.
•
An EC Type examination certificate No. 951174 is in force issued
by the Berufsgenossenschaftliches Institut für Arbeitssicherheit
(B.I.A.)
•
The product is CE marked.
Materials
The following materials are used in the production of this product.
•
Arm - Acetal and steel
•
Cup - ABS
•
Insert - Polyurethane
•
Cushion - PVC
Spare Parts
The cushions and inserts may be removed when they become dirty
or damaged and replaced by new parts from the 3M 1442 Hygiene
Pack.
Standard
The product meets all the requirements of the European Standard
EN352-3. The main performance tests in this standard are:
•
Attenuation (see below)
•
Adjustability: The ability of the ear muffs to fit a range of head
sizes.
•
Headband Force
•
Cushion Pressure
•
Resistance to damage
•
Ignitability
•
For more information on the above contact 3M.
Minimum Attenuation
16 test subjects are selected to wear the ear muffs and their
ability to hear sound at different intensities is tested over a range
of frequencies. A minimum attenuation of this sound is required
by the standard. Results from the 3M 1450 and Tuff Master II are
shown below:
Frequency
63
125
250
(Hz)
Mean Attenu-
11.4
11.1
18.1
ation (dB)
Standard De-
3.7
3.3
3.3
viation (dB)
Assumed
7.7
7.8
14.8
Protections
(dB)
SNR = 26dB H = 29 M = 23 L = 15
Maintenance
•
At the end of each shift the cushions of the ear muffs should be
wiped with the 3M 105 face seal cleaner so they may remain
clean and hygienic.
•
Ear muffs and in particular cushions, may deteriorate with use and
should be examined at frequent intervals for signs of damage. If
this is discovered the cushion should be removed from the earcup
and replaced. Inspect the earcup for damage and cracking. If this
is found, the earcup should be replaced. Finally check the arm to
ensure it is flexible and still maintains sufficient force to hold the
earcups firmly to the side of the head.
•
If the ear muff cannot be cleaned or a damaged component cannot
be replaced, dispose of the ear muffs and obtain a new pair.
500
1000
2000
4000
8000
25.1
27.0
28.6
38.6
40.2
3.1
2.3
2.4
2.6
3.3
22.0
24.7
26.2
36.0
36.9
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Summary of Contents for 3M 1450
- Page 1 • Aircraft • Power plants of frequencies. A minimum attenuation of this sound is required by the standard. Results from the 3M 1450 and Tuff Master II are • Utilities shown below: The 1450 ear muffs are especially recommended for intermittent wear.
- Page 2 1) The arms are made of Acetal and the cushions are made of PVC. This product may be adversely affected by certain chemical substances. For further information contact 3M. 2) Ear muffs and in particular cushions, may deteriorate with use and should be examined at frequent intervals for cracking and leakage, for example, at the start of every shift.