Signal Processing Concepts and Applications

What is the primary function of signal processing in communication?

• To convert physical information into a signal, transmit it, and then convert it back into content.

• To amplify signals for longer-distance transmission.

• To encrypt messages for secure communication.

• To filter out unwanted noise from a signal.

Which statement best describes a transducer?

• A device that stores digital information.

• A device that converts one form of energy or information into another.

• A device that amplifies electrical signals.

• A device that transmits signals wirelessly.

Why is encoding an essential step in signal processing?

• To make signals more visually appealing.

• To reduce the physical size of communication devices.

• To convert information into a format suitable for transmission.

• To increase the speed of signal reception.

In the context of radio waves, what does bandwidth refer to?

• The physical distance a radio wave can travel.

• The strength or amplitude of a radio wave.

• The range of different frequencies a signal can represent.

• The speed at which a radio wave travels through the atmosphere.

What is the primary effect of noise on a signal during transmission?

• It increases the signal's speed.

• It changes the signal from its original form.

• It amplifies the signal's strength.

• It reduces the signal's bandwidth.

Which condition is least ideal for reliably sending signals?

• High bandwidth and low noise.

• Low bandwidth and high noise.

• High bandwidth and high signal strength.

• Low noise and high signal strength.

What significant contribution did Claude Shannon make to the field of communication?

• He invented the first radio.

• He developed a mathematical theory for reliable information transmission.

• He created the first digital computer.

• He discovered new types of electromagnetic waves.

Why are digital signals generally less susceptible to noise compared to analog signals?

• Digital signals have a continuous variation, making them harder to distort.

• Digital signals use a small set of distinct states, which are easier to distinguish even with distortion.

• Digital signals are always transmitted at higher power levels.

• Digital signals can travel faster than analog signals.