Surround Sound - An audio reproduction system using four or more speakers to simulate the three-dimensional effect of a live music performance or a cinematic environment. With surround sound, the phase of the original sound is delayed from a two-channel source, creating a surround effect and allowing you to simulate stereo sound even from a monaural source.
Tungsten - Metal in filament of bulbs creating illumination when electronically charged. Tungsten= 3200 Kelvin an orange color.
High-Pass Crossover - A filter, often found in a powered subwoofer, that accepts the full-range audio signal heading for the main speakers. This filter only passes frequencies falling above a predetermined frequency and it attenuates those below. The goal is to prevent the main speakers from reproducing sounds that would be more accurately reproduced by a subwoofer.
Fresnel Screen (projection TV) - Helps balance out the light of the image across the screen. Without this screen, there would only be a centre screen bright spot. This screen receives the initial light image from the mirror and is made up of grooves, not unlike the grooves on an original LP record, in a circular pattern.
IMEI - International Mobile Equipment Identity: a unique number given to every mobile phone and usually found behind the battery. When a phone is reported stolen, the number is marked invalid.
Terrestrial - A broadcast signal transmitted "over the air" to an antenna.
DPI (Dots Per Inch) - The unit of measure used to describe the resolution of image files, scanners, or output devices. The measure of distinct pixels that a device can produce either horizontally or vertically in one inch.
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