This document, which is a Technical Report, gives recommendations for and guidance on the 
design, planning, installation, testing, operation and maintenance of a hearing-loop system 
(HLS) intended for communicating speech, music and/or other signals. It is mainly concerned 
with HLS for hearing enhancement, in which the signals are communicated to users of hearing 
aids equipped with magnetic pick-up coils. 
This document does not apply to induction-loop systems which use a carrier frequency, nor to 
other systems for hearing enhancement purposes which do not use magnetic induction.dition 1.1 2018-09 CONSOLIDATED VERSION colour inside Code of practice for hearing-loop systems (HLS) IEC TR 63079:2017-04+AMD1:2018-09 CSV(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright ？ 2018 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including