Question
Which of the following types of noise can often be reduced by a digital noise reduction?
Answer Options
- A) Broadband white noise
- B) Ignition noise
- C) Power line noise
- D) All these choices are correct
Correct Answer: D
Explanation
Digital Noise Reduction (DNR) uses sophisticated algorithms within a Digital Signal Processor (DSP) to analyze the frequency content of the incoming audio signal and differentiate between the desired voice/data and unwanted noise. This makes it highly versatile at targeting various forms of interference that traditional analog filtering cannot suppress.
Since DNR works by analyzing and modeling the noise profile in the passband, it can often effectively reduce or suppress broadband noise like white noise, repetitive impulse noise like ignition noise, and even the characteristic hum or buzz associated with power line noise. Therefore, a well-implemented DNR system can provide relief from all these choices are correct.
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