Oticon MultiFocus Behind-the-Ear Transistor Hearing Aid
The Oticon MultiFocus BTE hearing aid was manufactured by Oticon A/S in
Denmark in 1991.
The MultiFocus name referred to the fact that people reported their
hearing became multi-dimensional compared to their previous hearing
aids.
Technically, the Multifocus used analog technology. It had two
channels that split the frequency at 1,600 Hz. The low-frequency
channel had wide dynamic range compression. The high-frequency
channel had linear gain.
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The back view of the Oticon MultiFocus showing the adjustment
section (middle) and the the 3-position "M" (microphone), "T" (t-coil)
and "O" off switch (shown in off position). There are 3 adjustment
screws. The top screw..... The middle screw adjusts the overall gain (30
to 90 dB). The lower screw adjust the peak clipping level (70 to 90 dB).
Incidentally, the Oticon MultiFocus did not have a volume control. It
may have been the worlds first BTE hearing aid without a volume control. |
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The back view of the Oticon MultiFocus showing the adjustment area with
the faceplate covering it.
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The underside view of the Oticon MultiFocus.
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View of the Oticon MultiFocus showing the battery
compartment (bottom left). This hearing aid took a No. 675 battery.
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