HI I have gone through your mail and as you said that you have some unwanted sound in your left ear and you are already diagnosed as having sinusitis
with secretory otitis
media (fluid in middle ear ),before treatment you are advice to go for these investigations -(1) C.T.scan of para nasal sinuses
(2) culture and sensitivity of throat swab (3) Pure tone Audiometery (4) Impedance Audiometery. By these investigations one can asses weather your problem is due to fluid in middle ear or it is a disease of internal ear.so you are advice to consult your E.N.T.specialist for examination and co-relation with investigations to establish the diagnosis and treatment. Thanks.