Samvardhana Motherson Group Signal Engineer Interview Questions and Answers

Noise is unwanted random fluctuations in a signal, while signal is the desired information being transmitted.

• Noise is random and unwanted interference in a signal

• Signal is the desired information being transmitted

• Noise can distort or degrade the quality of a signal

• Signal is the meaningful data that is being communicated

• Examples: static on a radio (noise) vs. music being played (signal)

Audio signals are variations in air pressure that are converted into electrical signals by a microphone and then processed and amplified to produce sound.

• Audio signals are variations in air pressure caused by sound waves.

• Microphones convert these variations into electrical signals.

• The electrical signals are then processed and amplified to produce sound.

• Examples of audio signals include music, speech, and environmental

The equation for a time domain signal can be converted into the frequency domain using Fourier transform.

• The equation for a time domain signal is typically represented as x(t) or f(t).

• To convert this signal into the frequency domain, we can use Fourier transform which decomposes the signal into its constituent frequencies.

• The Fourier transform equation is given by X(f) = ∫[x(t) * e^(-j2πft)] dt, where X(f) represents t...read more