Acoustic Signal Processing of Fundamental Frequency (F0) Dynamics in Persuasive Sentences from Indonesian Presidential Campaign Videos
Miftahulkhairah Anwar (1)- Gede Satya Hermawan (2)- Norliza Jamaluddin (3)

(1) Universitas Negeri Jakarta- (2) Universitas Pendidikan Ganesha- (3) Universiti Pendidikan Sultan Idris Malaysia

Abstract

Political discourse studies have developed significantly- however, most previous research has primarily focused on textual linguistic aspects, while prosodic features remain underexplored. This study investigates the intonational contours and Fundamental Frequency (F0) dynamics of persuasive sentences in Indonesian presidential campaign discourse. A computational phonetics approach was employed using Python libraries, namely Parselmouth and NumPy. The data consisted of campaign videos presenting the visions, missions, and policy programs of the three Indonesian presidential candidates: Anies, Prabowo, and Ganjar, published by the Kompas TV news portal. The findings reveal distinctive F0 patterns and pitch contour characteristics among the candidates. Anies demonstrates more varied intonational movements, with a maximum F0 of 299.23 Hz, a minimum F0 of 75.06 Hz, and a pitch range of 224.17 Hz. Prabowo exhibits a denser and more stable pitch contour, with a maximum F0 of 299.98 Hz, a minimum F0 of 74.96 Hz, and a pitch range of 225.02 Hz. Meanwhile, Ganjar shows a relatively wider and more dispersed pitch contour, with a maximum F0 of 298.41 Hz, a minimum F0 of 75.05 Hz, and a pitch range of 223.36 Hz. These findings indicate that F0 dynamics contribute significantly to political persuasion and communicative style.

Keywords: fundamental frequency (F0), persuasive sentences, acoustic signal processing, political discourse, presidential campaign

Topic: Applied Technology in Physics