• kernelle@lemmy.dbzer0.com
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    4 days ago

    I was with you until: “[…] but it can also be heard by the examiner (eg, by placing a stethoscope over the patient’s external auditory canal).” and now I’m even more confused

    • BanMe@lemmy.world
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      3 days ago

      The DC power supply inside your ears is only medium quality and so your preamp is prone to picking up coil whine.