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A line array is a loudspeaker system that is made up of a number of usually identical loudspeaker elements mounted in a line and fed in phase, to create a near-line source of sound. The distance between adjacent drivers is close enough that they constructively interfere with each other to send sound waves farther than traditional horn-loaded ...
Sound from an array spreads less than sound from a point source, by the Huygens–Fresnel principle applied to diffraction.. While a large loudspeaker is naturally more directional because of its large size, a source with equivalent directivity can be made by utilizing an array of traditional small loudspeakers, all driven together in-phase.
A Butler matrix can also feed a circular array giving 360° coverage. A further application with a circular antenna array is to produce omnidirectional beams with orthogonal phase-modes so that multiple mobile stations can all simultaneously use the same frequency, each using a different phase-mode. [7]
The most common form of log-periodic antenna is the log-periodic dipole array or LPDA, The LPDA consists of a number of half-wave dipole driven elements of gradually increasing length, each consisting of a pair of metal rods. The dipoles are mounted close together in a line, connected in parallel to the feedline with alternating phase.
Commercially, this type of loudspeaker arrangement is known as a line array. This technique has been around for many years but since the emergence of modern digital signal processing (DSP) technology there are now many commercially available products on the market. Beam steering and directivity Control using DSP was pioneered in the early 1990s ...
In other cases, such as in a line array, the summed variation will have a bigger amplitude than any of the components individually; this is called constructive interference. green wave traverse to the right while blue wave traverse left, the net red wave amplitude at each point is the sum of the amplitudes of the individual waves.
The Bottom Line. Travel can disrupt your sleep in myriad ways. The good news is, incorporating magnesium into your diet can help you conquer sleep-related challenges when traveling. Magnesium-rich ...
Beamforming or spatial filtering is a signal processing technique used in sensor arrays for directional signal transmission or reception. [1] This is achieved by combining elements in an antenna array in such a way that signals at particular angles experience constructive interference while others experience destructive interference.