1450 Ear Muffs - 3M
3 1450 Ear Muffs Data Sheet
Features
Standard
• 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.
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.
Applications The 3M 1450 ear muffs can be used in many industries where damaging noise is present and head protection is required, such as: • Construction • Metal industry • Power plants • Aircraft • 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.
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 (Hz) Mean Attenu-
63
125
250
500
1000
2000
4000
8000
11.4
11.1
18.1
25.1
27.0
28.6
38.6
40.2
3.7
3.3
3.3
3.1
2.3
2.4
2.6
3.3
7.7
7.8
14.8
22.0
24.7
26.2
36.0
36.9
ation (dB) Standard Deviation (dB) Assumed 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.
Assembly/Wearing Instruction
1. Ear Muff Assembly: Insert the tongue of the ear muff into the slot, located at the side of the helmet.
2. Working Position: Adjust the cups aligning the height of the cups making sure the cup covers the entire ear. Be careful that the cushions seal firmly against the head with no interference from objects such as respirator headbands or arms of glasses, in order to obtain the best performance.
3. Resting Position: Pull the ear muff away from the ear until it locks into position. In the resting position the distance from the ear is far enough to prevent “echo noise” when communicating. In noisy surroundings, always wear the ear muffs in working position.
4. Parking Position: To store the ear muffs on the helmet, just pull them into resting position. Then rotate the ear muffs upwards until they lock again. The cushions will not be damaged and the muffs can dry while in this position.
Warnings
5. Storage: When the helmet is not being used, pull down the ear muffs and press inwards. Store the ear muffs somewhere clean and dry at normal room temperature in a uncontaminated area where they are unlikely to be damaged.
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. 3) Simplified Noise level Reduction (SNR) is based on the attenuation of continuous noise and may not be an accurate indicator or protection attainable against IMPULSE noise such as gunfire. 4) For noise environments dominated by frequencies below 500 Hz the C-weighted environmental noise level should be used.
Occupational Health Group 3M United Kingdom PLC
Occupational Health Group 3M Ireland
3M Centre Cain Road, Bracknell Berkshire RG12 8HT Tel: 0870 60 800 60
3M House, Adelphi Centre, Upper Georges St. Dun Laoghaire, Co. Dublin, Ireland Tel: 1 800 320 500
www.3m.com/uk/ohes [email protected]
CH1450 05/2007
3
Features
Standard
• 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.
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.
Applications The 3M 1450 ear muffs can be used in many industries where damaging noise is present and head protection is required, such as: • Construction • Metal industry • Power plants • Aircraft • 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.
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 (Hz) Mean Attenu-
63
125
250
500
1000
2000
4000
8000
11.4
11.1
18.1
25.1
27.0
28.6
38.6
40.2
3.7
3.3
3.3
3.1
2.3
2.4
2.6
3.3
7.7
7.8
14.8
22.0
24.7
26.2
36.0
36.9
ation (dB) Standard Deviation (dB) Assumed 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.
Assembly/Wearing Instruction
1. Ear Muff Assembly: Insert the tongue of the ear muff into the slot, located at the side of the helmet.
2. Working Position: Adjust the cups aligning the height of the cups making sure the cup covers the entire ear. Be careful that the cushions seal firmly against the head with no interference from objects such as respirator headbands or arms of glasses, in order to obtain the best performance.
3. Resting Position: Pull the ear muff away from the ear until it locks into position. In the resting position the distance from the ear is far enough to prevent “echo noise” when communicating. In noisy surroundings, always wear the ear muffs in working position.
4. Parking Position: To store the ear muffs on the helmet, just pull them into resting position. Then rotate the ear muffs upwards until they lock again. The cushions will not be damaged and the muffs can dry while in this position.
Warnings
5. Storage: When the helmet is not being used, pull down the ear muffs and press inwards. Store the ear muffs somewhere clean and dry at normal room temperature in a uncontaminated area where they are unlikely to be damaged.
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. 3) Simplified Noise level Reduction (SNR) is based on the attenuation of continuous noise and may not be an accurate indicator or protection attainable against IMPULSE noise such as gunfire. 4) For noise environments dominated by frequencies below 500 Hz the C-weighted environmental noise level should be used.
Occupational Health Group 3M United Kingdom PLC
Occupational Health Group 3M Ireland
3M Centre Cain Road, Bracknell Berkshire RG12 8HT Tel: 0870 60 800 60
3M House, Adelphi Centre, Upper Georges St. Dun Laoghaire, Co. Dublin, Ireland Tel: 1 800 320 500
www.3m.com/uk/ohes [email protected]
CH1450 05/2007
3
