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BS EN 61094-3:2016

BS EN 61094-3:2016

Current

Current

The latest, up-to-date edition.

Electroacoustics. Measurement microphones Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

02-28-2017

Publisher

British Standards Institution

FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Reference environmental conditions
5 Principles of free-field calibration by reciprocity
6 Factors influencing the free-field sensitivity
7 Calibration uncertainty components
Annex A (informative) - Values for the position of the
        acoustic centre
Annex B (normative) - Values of the air attenuation
        coefficient
Annex C (informative) - Environmental influence on
        the sensitivity of microphones
Annex D (informative) - Application of time selective
        techniques for removal of unwanted reflections
        and acoustic interference between microphones
Bibliography
Annex ZA (normative) - Normative references to international
         publications with their corresponding European
         publications

Defines a primary method of determining the complex free-field sensitivity of laboratory standard microphones so as to establish a reproducible and accurate basis for the measurement of sound pressure under free-field conditions. Pertains to laboratory standard microphones meeting the requirements of IEC 61094-1.

This part of IEC61094 specifies a primary method of determining the complex free-field sensitivity of laboratory standard microphones so as to establish a reproducible and accurate basis for the measurement of sound pressure under free-field conditions, is applicable to laboratory standard microphones meeting the requirements of IEC61094‑1 , is intended for use by laboratories with highly experienced staff and specialized equipment. NOTE The calibration principle described in this part of IEC61094 is also applicable to working standard microphones, preferably used without their protection grid.

Committee
EPL/29
DevelopmentNote
Supersedes BS 5679(1979) & 94/205693 DC. (12/2005) Supersedes 12/30264191 DC. (09/2016)
DocumentType
Standard
Pages
36
PublisherName
British Standards Institution
Status
Current
Supersedes

BS EN 61094-4:1996 Specification for measurement microphones Specifications for working standard microphones

EN 61094-8:2012/AC:2013 Measurement microphones — Part 8: Methods for determining the free-field sensitivity of working standard microphones by comparison
IEC TS 61094-7:2006 Measurement microphones - Part 7: Values for the difference between free-field and pressure sensitivity levels of laboratory standard microphones
EN 61094-1:2000 Measurement microphones - Part 1: Specifications for laboratory standard microphones
IEC 61094-1:2000 Measurement microphones - Part 1: Specifications for laboratory standard microphones
EN 61094-2:2009 Electroacoustics - Measurement microphones - Part 2: Primary method for pressure calibration of laboratory standard microphones by the reciprocity technique
ISO 9613-1:1993 Acoustics Attenuation of sound during propagation outdoors Part 1: Calculation of the absorption of sound by the atmosphere
IEC 61094-8:2012 Measurement microphones - Part 8: Methods for determining the free-field sensitivity of working standard microphones by comparison
IEC 61094-2:2009 Electroacoustics - Measurement microphones - Part 2: Primary method for pressure calibration of laboratory standard microphones by the reciprocity technique
ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)

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