Which of the following types of noise are removed by a noise blanker?

A noise blanker works by detecting the sharp, high-amplitude spikes characteristic of impulse noise (such as automotive ignition noise or electric fence clicks) and momentarily muting the receiver for the brief duration of the pulse. Because it operates by completely cutting off the audio momentarily when a spike occurs, it is only effective against short-duration impulse noise. It is largely ineffective against continuous noises like broadband white noise, hum, or buzz, which do not have distinct, sudden peaks.