Digital vs Analog Signals

Why are digital signals less likely to be affected by noise than analog signals?

• There are more sources of analog noise than digital noise.

• Digital waves have higher amplitudes, and thus overpower noise

• Non-binary noise can be easily filtered out by digital systems.

• Analog radios add noise to the signals they receive to improve sound quality.

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Digital encoding sends or stores information using quantities that

• can vary continuously.

• can only have specific values.

• have no numeric gaps between one another.

• create smooth curves inside a sound wave.

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Which of the following is an advantage of digital over analog?

• Digital controls allow you more control over exact movement and direction.

• Digital calculations give you more accurate measurements.

• Digital controls move objects in predictable, exact increments.

• Digital devices generate stronger, more precise signals and waves.

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AM and FM radio stations

• switch between analog and digital signals to broadcast sound waves.

• transmit sound using multiple frequency ranges, including radio waves, visible light, and ultraviolet light.

• change the amplitude or frequency of waves to encode sounds.

• convert broadcasts into binary code.

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Which type(s) of signal(s) can be transmitted as radio waves?

• Analog

• Digital

• Both

• Neither

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Analog signals can be converted to digital through a process called _____.

• conversion

• processing

• sampling

• translation

Answer explanation

Analog signals are converted to digital signals through a process called sampling, which involves taking discrete measurements of the analog signal at regular intervals.

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Analog signals can be converted to digital through a process called _____.

• conversion

• processing

• sampling

• translation

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​ (a)   waves transmit information more reliably and are less likely to be affected by interference?

• Digital

• Analog

• All

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