HD 450.4-1984
Hearing Aids Part 4: Magnetic Field Strength in Audio- Frequency Induction Loops for Hearing Aid Purposes

Standard No.

HD 450.4-1984

Release Date

1984

Published By

European Committee for Electrotechnical Standardization（CENELEC）

Latest

HD 450.4-1984

HD 450.4-1984 history

• 1984 HD 450.4-1984 Hearing Aids Part 4: Magnetic Field Strength in Audio- Frequency Induction Loops for Hearing Aid Purposes