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  • The time relationship between two signals.
  • The relation of one audio waveform to another, particularly in sound waves. "In phase" means that the voltages of two signals with the same waveform are rising or dropping at the same time at the same rate all of the time. If they are not in phase, when the signals combine (either in a mixing console or as sound coming out of two different speakers arriving at the same location) it will cause a doubling or canceling of various frequencies of the signal. In balanced microphone wiring, the (+) wire is 180-degrees out of phase of the(-) wire to help eliminate noise picked up by the wire. In speakers, if two speakers are wired out of phase, one speaker will be pushing out to make a sound while the other will be pulling in to make the sound and hence be fighting each other. Source: Church Audio & Acoustics Glossary
  • Phase is the measure of progression of a periodic wave. Phase identifies the position at any instant which a periodic wave occupies in its cycle. It can also be described as the time relationship between two signals. Source:
  • (also "focus"): a chronologically limited cultural unit within a local culture sequence, characterized by sufficient diagnostic traits to set it apart from all other units. A phase is generally represented by 2 or more components in several sites and is the basic classificatory unit of archaeological "cultures".

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