| The Hearing Aid Museum | Hearing Aids of all types—Ear Trumpets, Carbon Hearing Aids, Vacuum Tube Hearing Aids, Transistor Hearing Aids, Body Hearing Aids, Eyeglass Hearing Aids and much more! | | | | Click on the "General Information" button (top button above) for an overview and general information on this category of hearing aid. | | Behind the Ear (BTE) Transistor Hearing Aids | Oticon Model E30V Behind-the-Ear Transistor Hearing Aid The Oticon Model E30V BTE hearing aid was manufactured by Oticon A/S in Denmark in 1984. The microphone grill is just above the ear hook (left). |  | Click picture for larger view | | | | | The back view of the Oticon Model E30V showing the volume control (middle) and the 3-position "M" (microphone), "T" (t-coil) and "O" off switch (shown in off position).
|  | Click picture for larger view | | | View of the Oticon Model E30V showing the battery door. This hearing aid used a No. 675 battery.
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