Which of the following types of noise are removed by a noise blanker?
Broadband white noise
Impulse noise✓Correct answer
Hum and buzz
All these choices are correct
Explanation
A noise blanker works by muting the receiver for the duration of short, high-amplitude bursts, so it only helps against impulse noise such as ignition pulses. Continuous noise like broadband white noise or hum is present all the time and cannot be gated out without removing the signal too.