Publikuar
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.
PUBLISHED
ISO 16:1975
90.93
Standard confirmed
30 sht 2022
Akustika - Frguenca me akordim standard (Toni muzikal standard)
60.60 Standard published