In article <1135482689.611974.272080 at f14g2000cwb.googlegroups.com>,
"Radium" <glucegen1 at excite.com> wrote:
> Have there ever been cases of subjects experiencing sudden and total
> deafness as a result of an abnormality in the brain only? Is this
> deafness ever unilateral? Is it accompanied by the false perception of
> a high-pitched sine-wave tone resembling that of a and CRT screen or
> electronic dog-whistle? If the deafness is unilateral while the false
> perception of this tone be only in the deaf ear?
You're describing tinnitus, where a pure piercing tone is "heard",
usually in one ear, and prevents you from hearing other things. That's
a phenomenon of temporary problems, or cell loss, in the receptor cells
in the inner ear, usually. However damage to the auditory part of the
brain can also produce deafness and abnormal sound experiences - they're
usually not pure tones though.