IEC 60118-4 Ed. 2.0被替代
Electroacoustics - Hearing aids Part 4: Induction loop systems for hearing aid purposes - Magnetic field strength
出版：International Electrotechnical Committee
专家解读视频
Applies to audio-frequency induction loop systems producing an alternating magnetic field at audio frequencies and intended to provide an input signal for hearing aids operating with an induction pick-up coil. The standard specifies requirements for the field strength in audio-frequency induction loops for hearing aid purposes, which will give adequate signal-to-noise ratio without overloading the hearing aid. The standard also specifies the minimum frequency response requirements for acceptable intelligibility. Methods for measuring the magnetic field strength are specified, and information is given on appropriate measuring equipment (see Annex B), information that should be provided to the operator and users of the system (see Annex C), and other important considerations.
UNE 20603-4:1982 - Identical
NF EN 60118-4:2007 - Identical
SN EN 60118-4:1998 - Identical
UNE EN 60118-4:2007 - Identical
AS 1088.4-1987 - Identical
SS IEC 118-4:1996 - Similar
DIN IEC 60118-4 (1991-11) - Similar
CEI EN 60118-4 Ed. 2 (2007) - Identical
HD 450.4:1984 - Similar
SS IEC 118:1986 - Similar
NFC 97 610:1986 - Identical
DIN EN 60118-4 (2007-08) - Identical
ONORM OVE EN 60118-4:1998 - Identical
SS EN 60118-4:1998 - Identical
CEI 29-11 Ed. 1 (1998) - Identical
BS 6083-4:1981 - Similar
NEN EN IEC 60118-4:2007 - Identical
BS EN 60118-4:2006 - Identical
I.S. EN 60118-4:2006 - Identical
SS EN 60118-4 Ed. 2 (2007) - Identical
PN EN 60118-4:2007 - Identical
OVE/ONORM EN 60118-4:2007 - Identical
