Why does Parkinson's affect the voice?
The same changes that affect movement affect the muscles used to speak and to breathe. Volume drops, speech can become fast or slurred, and the range the voice moves through narrows. The difficult part is that internal perception changes too — a voice that sounds normal from the inside can be much quieter than it feels.
That gap is the reason feedback matters. Seeing a loudness reading is very different from being told to speak up.
What does daily practice look like?
Speech therapy programmes for Parkinson's, including LSVT, are built around daily exercises with high effort and immediate feedback, and the home practice between sessions is essential for making progress. Use pitch and volume targets to guide your practice, with a clear record to help structure sessions and track progress.
What about swallowing?
Difficulty managing saliva is common with Parkinson's and is a separate problem from voice. A prompt at a set interval — a vibration or a discreet tap on the wrist — is a simple way to re-establish a swallow that has stopped being automatic.