EN 24869-3:1993 Acoustics - Hearing Protectors - Part 3: Simplified Method for the Measurement of Insertion Loss of Ear-Muff Type Protectors for Quality Inspection Purposes (ISO/TR 4869-3 : 1989)
This Technical Report specifies a method for measuringTheinsertion loss of ear-muff type hearing protectors for qualityinspection purposes.The method may also be used to in-vestigate production spreads of performance as part of typeapproval or certification procedures and to investigateThechange of performance with age.A measurement of application force is specified becauseTheforce affects acoustic performance.The method specified inThis Technical Report is not intendedto be used asThe basic test for type approval purposes. Per-formance data obtained byThis method are not to be quoted asrepresentingThe real-ear sound attenuation of an ear-muff, northe protection provided byThe ear-muff.
EN 24869-3:1993 history
1993EN 24869-3:1993 Acoustics - Hearing Protectors - Part 3: Simplified Method for the Measurement of Insertion Loss of Ear-Muff Type Protectors for Quality Inspection Purposes (ISO/TR 4869-3 : 1989)