Inclusion Criteria:  Patients with idiopathic Parkinson's disease (IPD) Patients who are in stages 1-3 according to Hoehn & Yahr test Native language is persian The patient or family complains about the person's speech condition Adequate vision and hearing No history of stroke, head injury, brain surgery, laryngeal diseases such as vocal cord nodules No other neurological disorders other than IPD Do not use treatment other than medication (such as deep brain stimulation surgery (DBS) informed consent  Exclusion Criteria:  If a patient develops a stroke or other neurological complication during treatment, they are excluded from the treatment Lack of cooperation