Boreiko, C J.; Abernethy, D J.; and Frazelle, J H., Detection of carcinogens which initiate the process of c3h/10t1/2 cell transformation. Abstr. (1982). Subject Strain Bibliography 1982. 2148. https://mouseion.jax.org/ssbb1982/2148
Hi Sue, The ringing in the ears is called Tinnitus. It can be a side effect of medications (check what you are taking) or for me, it can also be a sign that a migraine is on the way. It could also mean a number of many other things, depending on other symptoms you may have.
Tinnitus can occur in the inner ear, middle ear or even the outer ear. For some people in addition to loud noise, they can get ear pain and difficulty in sleeping due to stress. Frequent loud noise can cause anxiety or depression and difficulty in concentration. What Causes Ringing In The Ears :