| F0 | Fundamental frequency |
| PRISMA | Preferred Reporting Items for Systematic Reviews and Meta-Analyses |
| MDVP | Multidimensional Voice Program |
| CI | Cochlear implant |
| NHR | Noise-to-harmonic ratio |
| SPI | Soft phonation index |
| DUV | Degree of voicelessness |
| DVB | Degree of voice break |
| vAm | Peak amplitude variation |
| vF0 | Variable F0 |
| MPT | Maximum phonation time |
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