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  1. Contrast

    What Next? Hearing Perfectly Fine. Vitamin B12 Deficiency.

    yes, but the goal of the test is to determine if the cochlea is damaged and apparently that only can be done through rigorous testing.
  2. Contrast

    What Next? Hearing Perfectly Fine. Vitamin B12 Deficiency.

    How does this add up with how hair cells detect sound? The tonal audiogram still is and always will be laughably invalid. Have you even read Liberman's research on hidden hearing loss? That would also strongly suggest hearing health being centric to how well one hears in complex background...