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.