12/2/2023 0 Comments Praat formantsThis is due to differences in the algorithmic architectures of each program. However, the values of acoustic measurements are presented differently in different acoustic analysis software packages (AASPs) ( Deliyski et al., 2005 Smits et al., 2005 Woehrling and de Mareüil, 2007 Burris et al., 2014). The first two formants, F1 and F2, are typically used for vowel disambiguation and determining vowel quality in terms of the open/close and front/back dimensions ( Sumita et al., 2002, 2018). Formants are meaningful frequency components of human articulation that reflect the vocal tract’s resonance characteristics. One type of acoustic analysis that can be related to the movement of the articulators in speech is measurement of formant frequency. Therefore, speech rehabilitation after prosthetic treatment is necessary to help these patients reintegrate into society. This is because changes in the shape of the vocal tract alter its resonance properties, affecting the quality of the produced vowels and the clarity of consonant perception ( Kent et al., 2002). Therefore, the acoustic analysis of vowels is considered a helpful tool for evaluating speech production in maxillectomy patients as well as in other forms of atypical speech. In addition, the correlation between vowel quality and speech intelligibility has been reported in previous studies ( Sumita et al., 2002, 2018 Elbashti et al., 2019). Among phonetic sounds, vowels are the simplest sounds to analyze and describe acoustically without the need for an anechoic chamber ( Sumita et al., 2002). Vowels have special importance in speech acoustics and are realized as practical representations of general speech. The communication between the oral and nasal cavities lowers the intraoral air pressure, which is required for speech production, and leads to hypernasal speech, nasal air emission, and reduced loudness ( Babu et al., 2020). In other words, the structure of the vocal tract is changed by the surgical operation, thereby causing vowel disarticulation. Maxillectomy surgery for cancer treatment often results in impaired speech intelligibility due to unfavorable communication between the oral and nasal cavities ( Sumita et al., 2018 Fadhil and Mumcu, 2019). Digital acoustic analysis is particularly important in evaluating typical and atypical speech in different contexts, including clinical assessment, research, and education.
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