Karl, I have had tinnitus and hearing loss for many years now. I don't see that it is atributed to PD. I did a search on "parkinson's disease hearing loss" and "parkinson's disease tinnitus"...and found the following:

I don't know that I agree with this assumption, but here it is anyway...

"how is tinnitus related to Parkinson's disease, OCD, and depression"
"Neuroscientist Rodolfo Llinas, a researcher at the New York University Medical School, has found that Parkinson's disease, obsessive-compulsive disorder, depression, and tinnitus all share one cause in common: they may result from disruptions in electrical signals between the thalamus and the cortex, two brain regions [1]. The thalamus and the cortex produce our reality by communicating through electrical rhythms; when the cells misbehave, they produce low-frequency oscillations that set off activity in surrounding areas--leading to the symptoms [1]. In other words, the two brain regions that normally fire their cells in synchrony become decoupled [2]. This decoupling may produce the ear-ringing of tinnitus, as well as the immobility and shaking seen in Parkinson's disease, the hand-wringing in obsessive-compulsive disorder, and the deep sadness in depression [2].

Source: http://tinyurl.com/2tdlxg

references
1. Anonymous. 2000. The rhythm of mind. Discover 21 (1). 24.
2. Blakeslee, S. 1999. New way of looking at diseases of the brain. New York Times 10-26-1999. F1.