Oticon 567 U Behind-the-Ear Transistor Hearing Aid The Oticon 567 U BTE hearing aid was manufactured by Oticon A/S in Denmark in 1970. There were actually four versions—the SX series for severe hearing losses, the U and UX series for moderate losses, and the PC series for mild losses. The UX and SX sub-models incorporated a ceramic microphone instead of the standard magnetic microphone used in the U and PC versions. The ceramic microphone amplified the low frequencies more than the magnetic microphone did. |  | Click picture for larger view | | |   | | |
| Rear view of the Oticon Model 567 U showing the "O" (off), "T" (t-coil) and "M" (microphone) switch shown in the off position (top). The battery door is in the middle and below it is the volume control (bottom).
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| View of the Oticon Model 567 U showing the battery door opened. This hearing aid used a No. 675 battery.
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| Underside view of the Oticon Model 567 U showing the model number and serial number (bottom left) and microphone port (top right) just below the ear hook. The microphone opening was located here to protect it from wind noise. Notice the green dot (middle) on the hearing aid. The U and UX versions had a green dot, the SX version had a red dot, and the PC version had a blue dot. |  | Click picture for larger view | | | |
| View of the Oticon Model 567 U showing its size.
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