mastoid bone hearing aid equalizer ????

I don’t know if this is any help but I have Costco KS6 aids – a Made for Iphone aid. With an iPhone’s setting, you can adjust treble and bass. You can also stream from the phone’s microphone. That should give you access to an equalizer along with using a microphone that can be located by or near the person you are communicating with. That may give you a clear voice to concentrate on.