+An **Analog Signal** is a continuous wave, constantly changing to reflect a physical quantity. Unlike a [Digital Signal](/wiki/digital_signal), its fluctuations are smooth and unbroken, capturing the nuanced variations of the real world, such as sound or light intensity, before conversion by an [Analog-to-Digital Converter](/wiki/analog_to_digital_converter).
+## See also
+- [Digital Signal](/wiki/digital_signal)
+- [Signal Processing](/wiki/signal_processing)
+- [Sensor](/wiki/sensor)
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