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  • BS EN 24869-3:1994

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    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    Acoustics. Hearing protectors Simplified method for the measurement of insertion loss of ear-muff type protectors for quality inspection purposes

    Available format(s):  Hardcopy, PDF

    Superseded date:  31-08-2007

    Language(s):  English

    Published date:  15-02-1994

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    Cooperating organizations
    National foreword
    Brief history
    Method
    1. Scope
    2. Normative references
    3. Definitions
    4. Principle
    5. Measurement of the insertion loss of ear muffs
    6. Measurement of application force
    7. Reporting of data
    Annex
    A. (informative) The acoustic test fixture used as a
         directional microphone
    Tables
    1. Random incidence field requirements
    A.1 Front-to-random sensitivity index
    Figures
    1. Example of an acoustic test fixture
    2. Example of a test site arrangement (acoustic tunnel)
    National annexes
    NA (informative) Committees responsible
    NB (informative) Cross-references

    Abstract - (Show below) - (Hide below)

    For quality inspection purposes and to investigate production spreads of performance and changes with age.

    General Product Information - (Show below) - (Hide below)

    Committee EH/1
    Development Note Supersedes BS DD192(1990) and 82/54605 DC. Also numbered as ISO TR 4869-3. (09/2005)
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS 6840-7(1996) : 1996 SOUND SYSTEM EQUIPMENT - PART 7: HEADPHONES AND EARPHONES
    DEFSTAN 00-25(PT14)/1(2000) : 2000 HUMAN FACTORS FOR DESIGNERS OF EQUIPMENT - PART 14: MILITARY LAND VEHICLE DESIGN
    PD 6545:2005 Intended use of human head and ear simulators-guide

    Standards Referencing This Book - (Show below) - (Hide below)

    BS 6397:1983 Specification for scales and sizes for plotting frequency characteristics and polar diagrams
    ISO 4869-1:1990 Acoustics Hearing protectors Part 1: Subjective method for the measurement of sound attenuation
    BS 903-A26:1969 Physical testing of rubber Determination of hardness
    BS 2475:1964 Specification for octave and one-third octave band-pass filters
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