Technical Resources and Standards

On this page you will find some useful resources provided by industry experts, to help further your knowledge of hearing loop system related topics.  


We can offer technical support, not only to our members, but also to anyone else that needs some advice. For technical queries, please contact technical@ihlma.org.


All the IEC standards, except for TR 63079, are also available as BS ENs. The TR is available as PD IEC TR 63079.


IEC 60118-0:2015 

Electroacoustics - Hearing aids - Part 0: Measurement of the performance characteristics of hearing aids

IEC 60118-4:2014+AMD1:2017 CSV 

Consolidated version

Electroacoustics - Hearing aids - Part 4: Induction-loop systems for hearing aid purposes - System performance requirements

IEC 62489-1:2010+AMD1:2014+AMD2:2017 CSV 

Consolidated version

Electroacoustics - Audio-frequency induction loop systems for assisted hearing - Part 1: Methods of measuring and specifying the performance of system components

IEC 62489-2:2014 

Electroacoustics - Audio-frequency induction loop systems for assisted hearing - Part 2: Methods of calculating and measuring the low-frequency magnetic field emissions from the loop for assessing conformity with guidelines on limits for human exposure

IEC TR 63079:2017 

Code of practice for hearing-loop systems (HLS)

ETSI EN 300 422-4 V2.1.1 (2017-05)

Wireless Microphones; Audio PMSE up to 3 GHz; Part 4: Assistive Listening Devices including personal sound amplifiers and inductive systems up to 3 GHz; Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU


The care and feeding of neck loops for assistive hearing

A neck loop is a personal induction loop about 230 mm in diameter, intended to be used with a static or hand-held source of audio signals and transmit them magnetically to the user's one or two hearing aids equipped with telecoils....