# Available source codes

### PyEnf
* Python based, ENF extraction from audio recordings.
* Using harmonic frequencies and frequency spectrogram.

https://github.com/deerajnagothu/pyenf_extraction
  
### Assessing spectral estimation methods for Electric Network Frequency (ENF) Extraction.
* Matlab source codes.
* Signal filtering with a very sharp bandpass filter (main.m).
* ENF extraction procedure using overplapping windows and a Quadratic Interpolation (main.m). Very good results achieved due to proper parameter tuning both in the pre-processing step and in the main procedure.
* Georgios Karantaidis and Constantine Kotropoulos. 2018. "ASSESSING SPECTRAL ESTIMATION METHODS FOR ELECTRIC NETWORK FREQUENCY EXTRACTION",In 22nd Pan-Hellenic Conference on Informatics (PCI ’18), November 29-December 1, 2018, Athens, Greece. ACM, New York, NY, USA, 6 pages.  

https://doi.org/10.1145/3291533.329153
https://github.com/geokarant/ENF_extraction
