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IEC 60118-4:1981 ED1

Methods of measurement of electro-acoustical characteristis of hearing aids. Part 4: Magnetic field strength in audio-frequency induction loops for hearing aid purposes
1. 1. 1981.

Опште информације

99.60     27. 10. 2006.

IEC

TC 29

Međunarodni standard

17.140.50  

engleski   francuski   španski  

Kupovina

Revidiran

Jezik na kome želite da primite dokument.

Apstrakt

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.

Životni ciklus

TRENUTNO

POVUČEN
IEC 60118-4:1981 ED1
99.60 Povlačenje stupilo na snagu
27. 10. 2006.

ISPRAVKE / IZMENE

POVUČEN
IEC 60118-4:1981/AMD1:1998 ED1

REVIDIRAN OD

POVUČEN
IEC 60118-4:2006 ED2