586. Engineering Standards for Personnel Protective Equipment ...

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KLM TechnologyGroupProject Engineering StandardPERSONNEL SAFETYPROTECTIVE EQUIPMENT(PROJECT STANDARDS ANDSPECIFICATIONS)Page 12 of 167Rev: 01July 2011Basic PatternsFig. 1 - Glove PatternsFig. 2 - Cuff Patterns
KLM TechnologyGroupProject Engineering StandardPERSONNEL SAFETYPROTECTIVE EQUIPMENT(PROJECT STANDARDS ANDSPECIFICATIONS)Page 13 of 167Rev: 01July 2011Ear ProtectionAcoustic Test Fixture (ATF) - A device that approximates certain dimensions ofan average adult human head and is used for measuring the insertion loss of earmuffs. For this purpose it includes a microphone arrangement for measuringsound pressure levels.Attenuation - The algebraic difference in dB between the 1/3 octave bandpressure level, as perceived by a real ear at threshold in a specified sound fieldunder specified conditions, with the hearing protector absent and the soundpressure level with the hearing protector being worn, with other conditionsidentical.Cup - A hollow, approximately hemispherically shaped component which ismounted on the headband and to which a cushion and a liner are usually fitted.Note: In this context, a cup is sometimes referred to as a shell.Cushion - A deformable cover, usually foam plastics or liquid filled, fitted to therim of the cup to improve the comfort and fit of the ear muffs on the head.Note: In this context, a cushion is sometimes referred to as a seal.Decibel (dB) - One-tenth of a bel, a scale unit used in comparison of themagnitude of powers. The number of bels, expressing the relative magnitudes oftwo powers, is the logarithm to the base 10 of the ratio of the powers.Ear Muffs - A hearing protector, either fitting over and enclosing the pinna andsealing against the side of the head (circumaural) or sealing against the pinna(supraaural). Over-the-head, and ear muffs are designed to be worn with theheadband passing over the top of the head and behind the head respectively. Ahead strap supports behind-the head ear muffs by being in contact with the top ofthe head. Universal ear muffs can be worn in either mode.Ear Plugs - A hearing protector inserted and worn in the ear canal or in the earcavity.- DisposableIntended for one fitting only.- ReusableIntended for more than one fitting.- Sonic ear plugInsert tipe ear protector utilizing a moving diaphragm, that attenuate harmfulhigh level noises without blocking normal background sound.
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586. Engineering Standards for Personnel Protective Equipment ...

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