🔍 Key Concepts

• Digital signal processing (DSP) methods used to reduce or remove unwanted noise • Difference between algorithmic processing terms (used in DSP theory) and user-interface features (what a radio button might be labeled) • How subtraction of a noise estimate from the incoming signal is typically achieved in DSP

💭 Think About

• Which option sounds like a general DSP processing technique that could mathematically model and subtract an estimate of the noise from the signal? • Which choices sound more like front-panel features or simple threshold devices rather than full DSP algorithms? • Look up how modern DSP receivers remove background hiss or interference—what technical term is used in textbooks and standards?

✅ Before You Answer

• Identify which choice is a well-known DSP concept used in textbooks and technical papers. • Eliminate options that merely describe on/off gating or simple level limiting rather than continuously adjusting to the noise characteristics. • Ask whether the method would be able to adapt to changing noise conditions (strong vs weak signals, varying interference).