Reasons for sound background as a symptom of hearing aid impairment: The sulfur cap is a quiet, monotonous noise without focusing at one point, similar to the sound of a surf, says Dr. Denis Slinkin.
The cork rests on the eardrum - low frequencies, focusing at one point, when the head is tilted it is divided into 2 parts. Swelling - noise, as if flowing along smooth lines in 2-3 bands, you can mix a light ringing.
Exudative otitis - distortion of sounds, ringing and noise in 2 bands. This also applies to eustachiitis. Water penetration: if there is a lot of metal salts - barely audible, squealing ringing, clay admixtures - noise - periodic clicks, mainly when turning the head. Labyrinthitis - a resounding noise. Decompression - floating noise effects with flowing noise. Otosclerosis - quiet monotonous noises. Acoustic injuries - constant low-frequency hum.
Spinal artery syndrome - piercing, monotone. Internal cerebral hydrocephalus: deep saturated noise, possible thunder, high intracranial pressure - smooth, quiet.
Fatigue, low or high hemoglobin, reduced immunity - noise increases during mental activity, physical activity. Taking antidepressants, narcotic and psychotropic drugs, schizophrenia, chemical poisoning - ringing obtrusively, possible sensory hallucinations (in the background as if indistinctly spoken osprey, perhaps splitting the speaker's voice), so says Dr. Denis Slinkin.
Inflammation of the auditory and or facial nerve is a squeak. At high fever - constant complex noise effects. Cervical colds, fragility of blood vessels - sound effects are unpredictable. Head injuries - low monotonous hum. Oxygen deprivation - quiet humming. Narrowing of veins and arteries of the cervical section - a volatile noise. Thyroid dysfunction - the effects are unpredictable. Diabetes mellitus - mainly rapid rising and falling noise of low tone. At a wasp bite, after a long allergic reaction - piercing, loud, high-frequency ringing.