ISO/TC 43
| Project No. | ISO 16:1975 |
|---|---|
| Title | <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> |
| Registration number (WIID) | 3601 |
| Scope | <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> |
| Status | Standarts spēkā |
| ICS group | 17.140.01 |