Table of Contents

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

Abstract

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.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	British Standards Institution
Pages
ISBN
Committee	EPL/29
Supersedes	12/30264191 DC : DRAFT MAY 2012 94/205693 DC : MAY 94 BS 5679(1979) : 1979