Which note is associated with 440 Hz in the standard tuning described?

Which note is associated with 440 Hz in the standard tuning described?

• A. A below middle C
• B. C above middle C
• C. A above middle C
• D. F above middle C

Answer: (C)

In standard tuning, 440 Hz is assigned to A above middle C. Middle C is C4, so the A directly above it is A4, which vibrates at 440 Hz. That’s why this note is the one associated with 440 Hz. Other nearby notes have different frequencies (for example, A3 is about 220 Hz, C5 is about 523 Hz, and F5 is about 698 Hz), so they don’t match 440 Hz.

In standard tuning, 440 Hz is assigned to A above middle C. Middle C is C4, so the A directly above it is A4, which vibrates at 440 Hz. That’s why this note is the one associated with 440 Hz. Other nearby notes have different frequencies (for example, A3 is about 220 Hz, C5 is about 523 Hz, and F5 is about 698 Hz), so they don’t match 440 Hz.