Channel sounding is a technique that evaluates a radio environment for wireless communication, especially MIMO systems. Because of the effect of terrain
quadrophonic, also called quadrasonic or by the neologism quadio) sound uses four audio channels in which speakers are positioned at the four corners of a listening
Echo sounding or depth sounding is the use of sonar for ranging, normally to determine the depth of water (bathymetry). It involves transmitting acoustic
Surround sound is a technique for enriching the fidelity and depth of sound reproduction by using multiple audio channels from speakers that surround the
narrow sea channel or an ocean channel between two land masses, such as a strait; or also a lagoon between a barrier island and the mainland. A sound is often
independent audio channels through a configuration of two loudspeakers (or stereo headphones) in such a way as to create the impression of sound heard from various
The SOFAR channel (short for sound fixing and ranging channel), or deep sound channel (DSC), is a horizontal layer of water in the ocean at which depth
version 6.3 on 5 May 2026. New features: Channel Sounding Inline Phase Correction Term Transfer Channel Sounding PHY-specific RTT Accuracy Running Out of
forward-compatibility. Enhanced resource allocation in OFDMA. Implicit channel sounding, optimized to require less airtime. Support for direct links, managed
Quadradisc or CD-4 (not to be confused with compact disc) was a discrete four-channel quadraphonic system for phonograph records. The system was created by JVC