Table of Contents

FOREWORD<br>INTRODUCTION<br>1 Scope<br>2 Normative references<br>3 Terms and definitions<br>4 General<br>5 Using components of a sound system in an<br>&nbsp;&nbsp;&nbsp;induction-loop system<br>6 Meters and test signals<br>7 Magnetic background noise level of the<br>&nbsp;&nbsp;&nbsp;installation site<br>8 Characteristics to be specified, methods<br>&nbsp;&nbsp;&nbsp;of measurement and requirements<br>9 Small-volume systems<br>10 Setting up (commissioning) the system<br>Annex A (informative) - Systems for small useful<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;magnetic field volumes<br>Annex B (informative) - Measuring equipment<br>Annex C (informative) - Provision of information<br>Annex D (informative) - Measuring speech signals<br>Annex E (informative) - Basic theory and practice<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;of audio-frequency induction-loop systems<br>Annex F (informative) - Effects of metal in the<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;building structure on the magnetic field<br>Annex G (informative) - Calibration of field-strength<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;meters<br>Annex H (informative) - Effect of the aspect ratio<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;of the loop on the magnetic field strength<br>Annex I (informative) - Overspill of magnetic field from an<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;induction-loop system<br>Bibliography

Abstract

Pertains to audio-frequency induction-loop systems producing an alternating magnetic field at audio frequencies and intended to provide an input signal for hearing aids operating with an induction pick-up coil (telecoil).

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Published
Document Type	Standard
Status	Current
Publisher	International Electrotechnical Committee
Pages
ISBN
Committee	TC 29