US Patent 5827173 is a “Prenatal audio communication device”. The mind boggles, and one fears for any prenate unfortunate enough to be enwombed by a woman who would even consider using such a thing:
“A prenatal audio communication device has a receiving chamber which accepts sound waves for transmission through a flexible tube to a megaphone secured against the abdomen of a pregnant woman so as to transfer sound waves from an external source with which the chamber is juxtaposed to a position proximate the ears of the baby in the womb. Means is connected to the megaphone for encircling the pregnant woman and securing the megaphone outlet port against her abdomen. Preferably, the inlet port has a perimeter contoured to be snugly juxtaposed about the mouth of a typical adult. A curved lip extends along the inlet port perimeter to form a continuous seal between the chamber and the face of the user, to increase the comfort level of the user when the chamber is pressed against the face and to make a single chamber more universally usable with a variety of sound wave source shapes and sizes. Preferably, the securing means is an at least partially elastically stretchable strap which connects to D-ring type members disposed on opposite sides of the megaphone.”
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