1. High-performance combination method of electric network frequency and phase for audio forgery detection in battery-powered devices 
Maryam Savari, Ainuddin Wahid Abdul Wahab, Nor Badrul Anuar 
Forensic Science International 
Volume 266, Pages (September 2016)
DOI: /j.forsciint
Copyright © 2016 Elsevier Ireland Ltd Terms and Conditions

2. Fig. 1 Schema of audio recording by PC, mobile phone, and laptop.
Forensic Science International  , DOI: ( /j.forsciint )
Copyright © 2016 Elsevier Ireland Ltd Terms and Conditions

3. Fig. 2
Steps of audio forgery detection with the combination of ENF and phase features.
Forensic Science International  , DOI: ( /j.forsciint )
Copyright © 2016 Elsevier Ireland Ltd Terms and Conditions

4. Fig. 3
(a) Extracted ENF of database. (b) Extracted ENF of PC audio without forgery (original audio). (c) Extracted ENF of PC audio with deletion forge at 25th second.
Forensic Science International  , DOI: ( /j.forsciint )
Copyright © 2016 Elsevier Ireland Ltd Terms and Conditions

5. Fig. 4
Difference between extracted ENF of database (green spectrum) and the extracted ENF of forged audio (blue spectrum) with deletion forgery at the 25th second.
Forensic Science International  , DOI: ( /j.forsciint )
Copyright © 2016 Elsevier Ireland Ltd Terms and Conditions

6. Fig. 5
(a) Extracted ENF of database. (b) Extracted ENF of laptop audio without forgery (original audio). (c) Extracted ENF of laptop audio with deletion forge at 25th second.
Forensic Science International  , DOI: ( /j.forsciint )
Copyright © 2016 Elsevier Ireland Ltd Terms and Conditions

7. Fig. 6
Comparison of the extracted ENF of database (red spectrum), original laptop audio (green spectrum), and forged laptop audio (blue spectrum) with deletion forge at 25th second.
Forensic Science International  , DOI: ( /j.forsciint )
Copyright © 2016 Elsevier Ireland Ltd Terms and Conditions

8. Fig. 7
(a) Extracted ENF of database. (b) Extracted ENF of mobile phone audio without forgery (original audio). (c) Extracted ENF of mobile phone audio with deletion forge at 30th second.
Forensic Science International  , DOI: ( /j.forsciint )
Copyright © 2016 Elsevier Ireland Ltd Terms and Conditions

9. Fig. 8
Comparison of the extracted ENF of database (red spectrum), original mobile phone audio (green spectrum), and forged mobile phone audio (blue spectrum) with deletion forge at 30th second.
Forensic Science International  , DOI: ( /j.forsciint )
Copyright © 2016 Elsevier Ireland Ltd Terms and Conditions

10. Fig. 9
Experimental results of phase distribution for (a) database, (b) original and (c) forged laptop signal.
Forensic Science International  , DOI: ( /j.forsciint )
Copyright © 2016 Elsevier Ireland Ltd Terms and Conditions

11. Fig. 10
Experimental results for phase distribution for (a) database, (b) original and (c) forged mobile phone signal.
Forensic Science International  , DOI: ( /j.forsciint )
Copyright © 2016 Elsevier Ireland Ltd Terms and Conditions