What is the process of demodulation in electronics?

Demodulation is the process of extracting the original information-bearing signal from a modulated carrier wave. In this context, the correct answer relates to the function of electronic filters, which are used to separate different signal frequencies, including the demodulated signals.

When a signal is modulated, it is typically superimposed onto a carrier wave, which allows it to be transmitted efficiently over distances. Demodulation, therefore, involves processing the received modulated signal, which can include filtering out unwanted frequencies or noise to retrieve the original audio or data signal.

While the concept of filtering can certainly play a role in the demodulation process—by allowing certain frequencies to pass while attenuating others—it's important to clarify that this process is quite different from merely decreasing the amplitude of frequencies. The act of demodulating is about the recovery of the transmitted information, which may require specific filtering techniques.

The other choices focus on different concepts in electronics. For example, increasing signal strength relates more to amplification rather than demodulation, converting sound into electrical signals pertains to transduction, and multiplexing signals refers to the technique of combining multiple signals for transmission over a single channel.

Thus, while filtering is a part of the demodulation process, its