660Hz
660Hz is a specific frequency in the audible range, lying roughly in the middle of the human hearing spectrum. It is commonly used as a reference point in audio engineering because it matches the pitch of a middle C for a 12-tone equal temperament system in many Western musical contexts. The frequency corresponds to a period of approximately 1.52 milliseconds and is one octave higher than 330Hz.
In acoustic theory, 660Hz falls within the mid‑range, an area that carries most musical harmonics and vocal
The human ear perceives 660Hz as a bright yet neutral tone. Studies on psychoacoustics show that this
In digital audio processing, 660Hz may serve as a cut‑off frequency for certain band‑pass filters used in