Electronic signals allow computers and other electronic devices to take in, send out, and process the information they need to function. Computers and other digital devices send and store information as a series of digits like 1s and 0s. We call signals made of only two digits, digital signals.
To better understand digital vs. analog signals…
LET’S BREAK IT DOWN!
A sound wave is an analog signal.
Sound waves are created by vibrations, and sound can be recorded on vinyl records with grooves that cause the needle on a record player to vibrate. Those vibrations are then amplified to play back the sound that was originally recorded. The pitch, or frequency, of that sound can take on a wide range of values. In other words, the frequency of that sound is a continuous variable. The signal produced by playing a record can be represented as a smooth sound wave that describes exactly how the sound changes over time. This is known as an analog signal. The sound wave produced by the record player is analogous, or similar, to the original sound wave that was recorded.