zero-crossing detection

Zero-crossing detection is a method used to identify the point where a waveform's signal value crosses the zero line, moving from positive to negative or vice versa. It helps in analyzing signals like sound, electrical currents, or vibrations by pinpointing specific moments in the wave’s cycle. This technique is important for synchronizing, measuring, or controlling systems, such as turning devices on or off at precise points to reduce electrical noise or ensure accurate timing. Essentially, it detects when the signal changes sign, providing valuable timing information about the waveform's behavior.