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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.
صوتيعاطل Sampمعدل جنيه Block/Hop تحديث وحدة المعالجة المركزية
تسخين 5s Warm-up progress 0.0 ثانية
Decision is withheld until at least 5.0 ثانية of analyzed frames accumulate. After that, the classifier uses EMA-smoothed evidence where the 1st harmonic (2×) is weighted above the fundamental.
قرار
ثقة
جودة
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
ضررHzديسيبل*مؤتمرمتوسط
60 Hz evidence
ضررHzديسيبل*مؤتمرمتوسط
Weights emphasize the 1st harmonic (2×) over the fundamental. Useful when microphones attenuate 50/60 Hz.