Hi. I am new to HA's. I have monaural hearing due to 50% loss heriditary sensoneural in my left ear. I got a Phonak Versata CIC last thursday. It works very well, with one glitch. If the refrigerator, or air condtioner/heat pump, or the ventilation system at work is running (I work in a cube farm) I hear a "white noise" constantly (until the refrigerator, etc. stops running. I have an appt this week with my AU to have a tweaking session. Is it possible to have these very low frequencies blotted out ? thanks...