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Design an audio denoising / speech enhancement system.

Cleaning noise out of speech is a tradeoff between how good it sounds and how fast it runs. A strong answer picks spectrogram masking versus waveform models against a real-time budget, names PESQ and STOI as the metrics, and is honest about the artifacts each approach introduces.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

Cleaning noise out of speech is a tradeoff between how good it sounds and how fast it runs. A strong answer picks spectrogram masking versus waveform models against a real-time budget, names PESQ and STOI as the metrics, and is honest about the artifacts each approach introduces.

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Next in this trackDesign a system to retrieve similar scenes from a large video corpus given a query clip.Next in this trackDesign an IDE code assistant (Copilot-style) that completes code as the developer types.Next in this trackDesign an enterprise semantic search system over a company's internal documents and tools.
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