Voice features
cough
Pre- and post-swallow voice quality will be monitored via acoustic features to investigate whether a change in voice quality occurs with P/A. Fundamental frequency (F0), harmonics-to-noise ratio (HNR), jitter, shimmer and intensity (dB) will be examined before and after each swallow trial to report changes in vocal fold vibration with P/A. Acoustic voice features will be correlated with the acoustic cough features and with P/A swallowing scores.