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ISO 16:1975

Acoustics -- Standard tuning frequency (Standard musical pitch)

General information
Valid from 01.01.1975
Directives or regulations
None
Standard history
Status
Date
Type
Name
01.01.1975
Main
Specifies the frequency for the note A in the treble stave and shall be 440 Hz. Tuning and retuning shall be effected by instruments producing it within an accuracy of 0,5 Hz.
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