General :: Control Volume From Bluetooth To Phone?

I have hearing aids and a bluetooth device called an ICOM that connects my phone to my hearing aids. I wear it around my neck and the wire around my neck connects to the hearing aids It is great for my end of the conversation, I actually hear the phone inside my ears! The problem I am having is the ICOM output is too loud or the microphone is too sensitive. People talking to me say they hear a lot of background noise. If I have the TV on it overwhelms the conversation. The same with wind noise in the car! Is there any way to turn down the incoming bluetooth audio? I looked for an app that would do this but did not find anything! The ICOM is made by Phonak and they tell me there is no way to turn down the audio sensitivity or the audio from the little box to my telephone!