Yes! Exactly! And in my left ear too. I assumed I was hearing the air-conditioning unit in my building (in a previous city apartment as well as my current address). But I also blamed the man downstairs of using a Tens Unit that made a vibrating hum and that made my body vibrate internally like a cellphone. I have not told my doctors about the humming sound because I could have just as easily been diagnosed with some kind of neurosis if I had said something to the effect that: "my body vibrates internally like a cellphone, accompanied by a low hum"? The body tremors were worse than the humming noise and a Neurologist recently diagnosed me with ES (Essential Tremors), so the Propranolol I am now taking does help with the internal shakes. I'm glad of the help. I just don't understand the why and wherefore of the hum. I'm not sure whether to call this Tinnitus? If I'm watching TV I don't hear much at all and it seems to be at bedtime, when all is quiet. I have been awakened with a louder hum between 3:00 and 3:30a.m. and I called it the witching hour. It has been a rough time and this has all happened in the last four years, about the time Covid came along, although I'm not sure if there is any relevance to the timing, other than some stress.