The 'noise the brain made up' has never made much sense to me. It's more likely physical damage to the sensory mechanism in the ear. One thing that surprised me when I googled how the ear works is that there is an active amplifier mechanism in there so if that's getting feedback it could make a noise your doc could hear.
Part of the cochlear amplifier mechanism is cells which move in response to electrical signals so you can hook them to a sound system for a laugh: https://www.youtube.com/watch?v=UXgFae2r1s8
Tinnitus other people can hear has a name - objective tinnitus - and is a thing though less common than subjective tinnitus which they can't.
As an aside the explanations I've read of what the amplifier cells do seem wrong to me in that they say they make the sound louder. From an engineering point of view you'd imagine it would make more sense to provide negative feedback loop so the membrane doesn't move too much and overload the ion channel gate which must only have a useful movement range of a few nm.
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The 'noise the brain made up' has never made much sense to me. It's more likely physical damage to the sensory mechanism in the ear. One thing that surprised me when I googled how the ear works is that there is an active amplifier mechanism in there so if that's getting feedback it could make a noise your doc could hear.
Part of the cochlear amplifier mechanism is cells which move in response to electrical signals so you can hook them to a sound system for a laugh: https://www.youtube.com/watch?v=UXgFae2r1s8
Tinnitus other people can hear has a name - objective tinnitus - and is a thing though less common than subjective tinnitus which they can't.
Vid on the cells making sounds https://youtu.be/b_3AngVJzp8?t=645
As an aside the explanations I've read of what the amplifier cells do seem wrong to me in that they say they make the sound louder. From an engineering point of view you'd imagine it would make more sense to provide negative feedback loop so the membrane doesn't move too much and overload the ion channel gate which must only have a useful movement range of a few nm.