Extra exam question E4E02
Subelement E4, AMATEUR PRACTICES· Group E4E
Which of the following types of noise can often be reduced by a digital noise reduction?
- A.Broadband white noise
- B.Ignition noise
- C.Power line noise
- D.All these choices are correct (correct answer)
WhyDigital noise reduction can often reduce broadband white noise, ignition noise, and power line noise alike. Digital noise reduction can meaningfully cut broadband white noise, ignition noise, and power line noise, since DSP noise reduction algorithms are built to recognize and suppress a fairly broad range of steady or repetitive noise characteristics that differ statistically from actual speech or CW content, answer D. Since it genuinely helps with all three noise types listed, no single one alone captures its full effectiveness.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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