purephase

Purephase is a term that can refer to several distinct concepts, primarily in the fields of audio engineering and telecommunications. In audio, Purephase is a brand name for a type of loudspeaker technology developed by Meridian Audio. This technology aims to improve the phase response of speakers, ensuring that all frequencies arrive at the listener's ear at the same time, which proponents claim leads to a more accurate and natural sound reproduction. Meridian's Purephase system often involves specific driver arrangements and crossover designs.

In telecommunications, particularly in the context of wireless communication systems like cellular networks, "pure phase" can describe a modulation technique or a signal characteristic. It relates to the instantaneous phase of a carrier wave. While not a widely adopted standard term for a specific modulation scheme itself, the concept of phase manipulation is fundamental to many digital modulation techniques such as Phase-Shift Keying (PSK). Maintaining a "pure" or consistent phase characteristic can be important for signal integrity and reliable data transmission, especially in environments with noise and interference. The term might be used informally to describe a signal that has undergone minimal phase distortion or to characterize the ideal state of a phase-modulated signal before it is affected by the transmission channel.