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Mains Frequency Estimator

Harmonics-aware, EMA averaging (up to 60s), and a 5s warm-up gate before decisions. **Prefers 2× (100/120 Hz) over fundamentals** to handle mic high-pass filtering.
Ohunlaišišẹ Sample oṣuwọn- Block/Hop- Imudojuiwọn- Sipiyu-
Dara ya 5s Warm-up progress 0.0s
Decision is withheld until at least 5.0s of analyzed frames accumulate. After that, the classifier uses EMA-smoothed evidence where the 1st harmonic (2×) is weighted above the fundamental.
Ipinnu-
Igbekele-
Didara-
50 Hz series
60 Hz series
Spectrum bars
Thick = fundamental; thin = harmonics; faint = detected peak offset
50-score (avg)-
60-score (avg)-
50 Hz evidence
IpalaraHzdB*ConfApapọ
60 Hz evidence
IpalaraHzdB*ConfApapọ
Weights emphasize the 1st harmonic (2×) over the fundamental. Useful when microphones attenuate 50/60 Hz.