Table 4: Correlation between Aerodynamic, Acoustic and Perceptual GRBAS Parameters (N = 39). First column indicates parameters and variables correlated, second column shows the correlation coefficient values, third column gives test P values.
Parameters and Variables Correlated |
Correlation Coefficient |
P Value |
pi max SPL/Strain |
0.32 |
0.047* |
pi duration/Roughness |
-0.329 |
0.041* |
phi mean air pressure/Fo |
0.438 |
0.005** |
phi mean resistance/Fo |
0.334 |
0.038* |
phi mean power/Shimmer |
0.45 |
0.004** |
phi volume/HNR |
0.331 |
0.04* |
phi peak air pressure/HNR |
0.511 |
0.001** |
phi mean air pressure/HNR |
0.383 |
0.016* |
phi mean power/Grade |
0.353 |
0.027* |
phi mean power/Roughness |
0.323 |
0.045* |
phi mean power/Breathiness |
0.365 |
0.022* |
phi mean power/Strain |
0.376 |
0.018* |
phi mean air pressure/Asthenia |
0.385 |
0.016* |
p’i mean air pressure/Asthenia |
0.318 |
0.049* |
Notes: Correlations with statistical significance are indicated by (*)
*P < 0.05; **P < 0.01; ***P < 0.001
Abbreviations: SPL: sound pressure level, HNR: harmonics to noise ratio.