If you are taking any non-steroidal anti-inflammatories stop. See if it changes the volume. If I take even one pill the volume goes up.
Go to Google and plug in every medication and over the counter drug you are taking and search for side effects. “Naproxen tinnitus,” for example.
Also, what has recently changed since this started? Food, stress, exercise, anything. Make a list. Then start a diary and do some experiments, increasing, decreasing the item in question. Note that it could take days to clear the effects of a single pill.
Good luck.
“Naproxen tinnitus,”
It woke me up one time when I did a heavy dose for gout but I rarely take it.