What does a frequency of 440 Hz mean?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
440 Hz is the international standard pitch for the musical note A above middle C (A4). This frequency means the sound wave vibrates 440 times per second. Musicians use 440 Hz as a reference point for tuning instruments—when an instrument plays A4 at exactly 440 Hz, it's considered "in tune" with standard concert pitch.
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