Probably coincidence..
I worked as mechanic for years, played with fireworks as a kid.... Left ear is horrible -right ear not too bad.
Went for hearing aids on Monday... Can't order aids until I see an ENT doctor to get clearance for the aids.
My tremors are right side (opposite side)

I went to a hearing dr. yesterday, he said PK has nothing to do with my hearing. My left ear is 100% good, and my hearing on my right side is 28%. The side PK effects.

What did you say? :)
Yes, there is a connection between loss of heaaring and PD.
But PD most likely makes it harder for your brain to process what your ears are hearing rather than preventing signals from your ears to reach your brain.
Read more
https://davisphinneyfoundation.org/auditory-pro...

Auditory processing disorder (APD) is characterized by difficulty in understanding speech. If you have APD, you might mistake minor differences between words, like hearing “Please reach the log” instead of “Please feed the dog.” You could also have trouble filtering certain sounds in noisy places or getting the order of words right.
several preliminary studies indicate a connection between auditory processing issues and Parkinson’s. FNormal aging combined with Parkinson’s neuropathology means that people with Parkinson’s are at a higher risk of developing different hearing impairments. They also found that a lack of dopamine, a hallmark characteristic of Parkinson’s, may be related to auditory issues because dopamine helps with sensory processing.

Auditory Processing and Parkinson’s 

https://davisphinneyfoundation.org/auditory-processing-and-parkinsons/