A variety of health conditions, from Parkinson's disease to Alzheimer's, are linked with changes in how a person speaks and sounds. (Getty Images) Everyone gets the occasional frog in their throat ...

Johns Hopkins defines stuttering as a voice speech disorder. Stuttering affects more than 80 million people worldwide, and in the United States, more than one million Americans stutter. A voice ...

Speech sound disorder (SSD) encompasses a group of communication disorders in which children have persistent difficulty articulating words or sounds correctly. Speech sound production requires both ...

Everyone gets the occasional frog in their throat that makes their voice sound different temporarily. Sometimes a cold or seasonal allergies are to blame, especially when you have that post-nasal drip ...