Hearing loop systems and equipment
Audio-frequency induction loop systems and system components for assisted hearing.
What do we cover
Scope of documents
Audio-frequency induction loop systems and system components for assisted hearing
Out of scope elements
Carrier-frequency induction-loop systems, IR systems, FM radio systems, Digital radio-based systems such as Bluetooth
Why is it important
Why Standardisation is necessary
Magnetic field strength, signal-to-magnetic noise ratio and frequency response, at least, need to be standardized in order to secure usable communication with hearing aids. Additionally, the volume of space in which the magnetic field strength is sufficient needs to be treated (it is usually too complex to define or specify).
Experts / Countries
Publications
IEC 60118-4:2014+Amd1:2017: Electroacoustics – Hearing aids – Part 4: Induction-loop systems for hearing aid purposes – System performance requirements
IEC 62489-1:2010+AMD1:2014+AMD2:2017 CSV: 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
TR 63079:2017+AMD1:2018: Code of practice for hearing-loop systems (HLS)
John Woodgate
Convenor