Speakers with PD:  Inclusion Criteria:  Have a medical diagnosis of Parkinson's disease Have experienced changes in your voice (e.g., your voice has "lost its strength") and your voice is a current concern Have not received individual speech therapy for the past 2 years (group therapy is ok) Have a stable medication schedule Have not received DBS (Deep Brain Stimulation) Are a native speaker of American English  Exclusion Criteria:  If criteria above are not met  Healthy controls:  Inclusion Criteria:  Be a native speaker of American English Have no history of neurological impairment Have no history of speech or language problems  Exclusion Criteria:  If criteria above are not met  Listeners:  Inclusion Criteria:  Be a native speaker of American English Be between 18-55 years old Have no history of speech-language-hearing problems Pass a free hearing screening Have received the Covid19 vaccine  Exclusion Criteria:  If criteria above are not met