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Definition of "Echo" |
Effect produced when sound is reflected from a surface sufficiently far away for the reflected sound to be separately distinguishable. / The reflection of the original sound wave as it bounces off a distant surface. The RF signal reflected back from a radar target. Radar definitions are located in their own section; Radar Terms. / Echocardiographic Images, European Commission Directorate General for Humanitarian Aid and Civil Protection, European Community Humanitarian Aid Department / In audio signal processing and acoustics, an echo plural echoes is a reflection of sound, arriving at the listener some time after the direct sound. Typical examples are the echo produced by the bottom of a well, by a building, or by the walls of an enclosed room and an empty room. / The Y-amplifier is linked in turn to a pair of Y-plates so that it provides the Y-axis of the the V/t graph. The overall gain of the Y-amplifier can be adjusted, using the VOLTS/DIV control, so that the resulting display is neither too small or too large, but fits the screen and can be seen clearly. The vertical scale is usually given in V/DIV or mV/DIV. |
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