Spectral Analysis of Speech Signal Characteristics: A Comparison Between Healthy Controls and Laryngeal Disorder

Acoustic, Myoelectric, and Aerodynamic Parameters of Euphonic and Dysphonic Voices: A Systematic Review of Clinical Studies

“…The same happens with the acoustic disturbance parameters, which are studied in 9 of the 13 cases and the results are provided as a percentage, except in one of them [23] which reports shimmer results in dB.…”

“…The voice evaluation techniques assessed in the different included studies are highly heterogeneous. In 10 of the studies [12,15,16,20,21,[23][24][25]28] only acoustic parameters were registered, two included only aerodynamic parameters [13,22], and in seven [14][15][16][17][18]26,27,29,30] both parameters were recorded. Only one study assessed the acoustic parameters together with the myoelectric activity [19].…”

“…Differences were also observed regarding the distance from the microphone to the mouth: 3 cm [19], 5 cm [16,17,23], 8 cm [29], 10 cm [14,21,24,25,28], 12 cm [30], and 15 cm [12,26].…”

“…Table 1 shows the summary of the methodology used in the 19 studies included in the review. In most of them, a sample made up of two groups was observed: an experimental group made up of people with vocal pathology and a control group made up of people without vocal pathology [12][13][14][15][16][17][18][19][20][21][22][23][24][25]. Another three were made up of a group of volunteers with vocal pathology [26][27][28] and two more were composed of volunteers without vocal pathology [29,30].…”

“…For the recording of objective voice measurements, software programs such as Multi-Dimensional Voice Program (MDVP) [16,18,27], FonoView 4.5 [28], Praat acoustic analysis program [21,[23][24][25], Dr. Speech [23], Computerized Speech Lab (CSL) [29], among others were used. Phonatory Aerodynamic System 6000 was used by one study for aerodynamic analysis [18].…”