Applies to audio-frequency induction loop systems producing an alternating magnetic field and intended to provide an input signal for hearing aids operating with an induction pick-up coil. Specifies a standard value of magnetic field strength in audio-frequency induction loops for hearing aid purposes, such as will give an adequate signal-to-noise ratio without overloading the hearing aid.
WITHDRAWN
HD 450.4 S1:1984
WITHDRAWN
EN 60118-4:1998
99.60
Withdrawal effective
Nov 1, 2009
WITHDRAWN
EN 60118-4:1998/A1:1998
WITHDRAWN
EN 60118-4:2006