How Presence Metrics Prevent False Tonal Detection in Noisy Spectral Analysis
Introduction False tonal detection is one of the most common structural failure modes in automated DSP pipelines. In noisy environments, PSD estimators frequently produce spurious peaks caused by: estimator variance leakage ripple random noise bursts If filters are synthesized directly from these peaks, systems end up suppressing noise instead of interference. As shown in: Why PSD Peak Detection Fails in Low SNR Signals How STFT Cross-Validation Improves Low-SNR Tone Detection frequency magnitude alone is insufficient for deterministic detection. ...