Atherosclerosis is one of the many possible causes of pulsatile tinnitus. It happens when plaque, such as fats, cholesterol, and other waste materials, builds up in your arteries, causing irregular or turbulent blood flow.
One of the signs you may notice if you have this condition is rhythmic noise in one of your ears. That does not include when you are angry, frightened, or emotional. But if you hear this rhythmic noise regularly, contact your physician.