GearCast - Glossary Definition for Phase

Definition for Phase

Sound waves are variations in air pressure that, like water waves, have peaks and troughs. Phase is the waveform's position in its current cycle. For example, if two versions of the same waveform are both at their peak, or at their trough, they're considered in phase. If one is at its peak and one is at its trough, they are considered out of phase. If one is at its peak and the other is at zero (between the peak and trough), then the two waveforms are 90 degrees out of phase. See also: Polarity