scope:

The present document specifies technical characteristics and methods of measurements for audio frequency induction loop amplifiers and receivers operating from 10 Hz to 9 kHz used in audio frequency induction loop systems (AFILS). NOTE: The object of an AFILS is to transmit an audio signal to people with hearing difficulties. The receiver in this case is normally a hearing aid with a built in telecoil. These radio equipment types are capable of operating in the frequency band within the 10 Hz to 9 kHz range: • either with an output connection(s) and dedicated loop(s) or with an internal loop(s); • for audio frequency baseband transmission (un-modulated and without the use of a carrier); The present document covers fixed induction loop amplifiers, mobile induction loop amplifiers and portable induction loop amplifiers. The present document covers the essential requirements of article 3.2 of Directive 2014/53/EU [i.1] under the conditions identified in annex A.