I have just completed a voice therapy program entitled “SPEAK OUT Live with intent” which I found very helpful. It addresses both concentration, volume, etc. and the cognitive problems facing individuals who have PD. This is not an advertisement. I have experienced the effects of PD (physical, mental, including vocal) for almost two (2) decades. I have survived, partially, through repetitive application of the therapeutic exercises given by trained therapists who have helped me regain and maintain solutions to the multiple problems attributed to this disease (normally obtained through prescriptions).