• kernelle@lemmy.dbzer0.com
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      2 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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        1 day ago

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