DIN IEC 60118-4:1991-11
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
HEARING AIDS; MAGNETIC FIELD STRENGTH IN AUDIO FREQUENCY INDUCTION LOOPS FOR HEARING AID PURPOSES
08-01-1999
01-12-2013
Applies to audio frequency induction loop system 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.
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