Hi - In the month of January I noticed that I had a condition in my left ear that had developed over several years and I had basically ignored it having been told that I had ear damage from a possible virus when I was a child. So I got used to the feeling that the left ear was "stuffed". Then in early January 2016 I developed a rythemic sound in the left ear. Most annoying. So I looked at several of the web sites asking about "ear flutter" Now this flutter frequency was not my heart beat. My heart beats about on average at 60 beats per minute. The sound I was getting was a whole lot faster. If you say the word "flip" over and over as fast as you can say it then that would be about the frequency of the sound. I went to the drug store and talked to the pharmist who agreed with me that likely a blockage of the eustation tube was giving me the stuffed ear feeling and creating the sound and the cillia was working hard to sweep the congestion down the tube to exit the mucus down the throat . But the tube was swollen and failed to clear thus the sound of the hard working cillia. The pharmist suggested Sudafed which I purchased and used for three days. The eustacion tube cleared, the sound stopped and as yet there is no stuffed feeling in the left ear and the sound is gone. Hope this helps.