Resources

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.


Useful Links


ETSI Standards

Download all ETSI standards for free here.


British and European Standards

Instructions on how to register to the BSI Standards Development Portal guide document can be found here.

Once registered here, you can view the various stages of development of any Standard, opt to receive regular updates on that Standard and even comment on drafts at public comment stage.


Technical Resources


IHLMA Position on Neck Loops and Cardiac Pacemakers

IHLMA recognises a concern expressed by some medical professionals of a potential for interface with cardiac pacemakers from the magnetic fields that exist in very close proximity to the wiring of a neck loop…


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….


Hearing Loops and Telecoils: When will they become obselete?

The International Hearing Access Committee (IHAC) aims to estimate the time a transition from the existing audio transmission to telecoils via hearing loop (HL) and other assistive listening systems (ALS) to a platform of digital audio streaming direct into hearing aids, will likely take.


Telecoils and Hearing Loops: The most available and accessible assistive listening technology

Assistive listening systems have been widely available since the 1930s, the most successful of which have been the hearing loop and telecoil combination.


Standards

A standard is an agreed way of doing something such as making a product, managing a process, delivering a service or supplying materials.
Standards are important because they ensure that equipment from different manufacturers will work together, and that users can benefit from services.

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