IEC 60263:1968 ed1.0

Заменен

Scales and sizes for plotting frequency characteristics — 3 стр.

Specifies standard proportions for the scales for plotting frequency characteristics and polar diagrams. Does not apply to audiograms.

Заменен на

IEC 60263:1975 ed2.0

ICS

17.140.50 Electroacoustics. Including sound level meters / Электроакустика. Включая слуховые аппараты и шумомеры