“…Taking into account the voice assessment parameters, the investigations were similar because of the eight RCTs, six used acoustic analysis (21, 23–27), and four included perceptive–auditory analysis (21, 24, 26, 28). However, regarding other outcome measures, the studies were heterogeneous varying from voice range profile (22, 25), maximum phonation time (MPT) (25), size of vocal fold lesion (22), muscle palpation (26), visual analog scale (VAS) (24, 26, 28), and scales like voice activity and participation profile (VAPP) (22, 26) and nordic musculoskeletal symptoms questionnaire (28).…”