Projekta Nr.ISO 16:1975
Nosaukums<p>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.</p>
Reģistrācijas numurs (WIID)3601
Darbības sfēra<p>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.</p>
StatussStandarts spēkā
ICS grupa17.140.01