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Brown vulcanite telescopic trumpet device consisting of three sections (10 inches total) that collapse into each other and one black metal curved earpiece (5 inches total). Rounded receptor part has 2.5 inch wide opening. The two smallest sections are a darker brown color than the receptor section.

Black lacquered pressed board trumpet device consisting of a number of coils that wrap together to form the device. A vulcanite earpiece protrudes from the receptor part. Top part of receptor is damaged but still attached.

Black pressed board telescopic trumpet device consisting of 4 sections that collapse into each other. No specific earpiece.

Black metal Tragus-like trumpet device. Curved funnel/mouthpiece, 2 inches wide, has 14 tiny holes, has a large opening on the side and is adjustable and removable from the earpiece section, which does not fit completely in the ear. On the base of the funnel section there is some type of bracket that fits into another apparatus. The earpiece section is 3 inches long.

Black metal and rubber Tragus-like trumpet device composed of two parts. Part 1 is a metal trumpet devised to adapt the principle of the elongated auricle as found in various animals, whereby the tragus is turned to the source of the sound. This section, moves for adjustment, is a curved metal piece, 2 inches wide, with half of the mouthpiece/receptor open. There are two rings soldered to the base of the mouthpiece to allow the user to wear the device around the neck and tiny holes along the surface. At the base of the receptor there is a metal attachment that swivels and allows the user to place the device on a flat surface. Part 2 is a rubber section, 9 inches long, that leads to the earpiece which is missing.

Black (flat finish) metal elliptical opening trumpet with earpiece made out of vulcanite. Mouthpice is elliptical shaped, 5.5 inches wide, with two opposed resonators inside the oval shaped collector. Earpiece is adjustable and can be lowered into the mouthpiece section of the device.

Small black trumpet with straight curves.

One Audi-ear sound conduction device that consists of one transparent plastic earpiece that resembles a shell to be worn over the ear using a wire clip. The device contains 3 ivory or white plastic eartips. The original box is a black hinged box that contains niches for the eartips and the device. American Earphone Co.

Small curved piece of flesh-colored metal designed to make the ear protrude slightly thus collecting the sound. No earpiece with this device. This small curved silver device was designed to make the ear protrude slightly to facilitate the collection of sound waves. The metal next to the skin was supposed to 'stimulate' acuity of hearing by the warmth created by the close contact with the skin overlying the post-auricular area. The device was painted flesh color to simulate skin, though much of the paint has eroded over time. 'WEBSTER'S R PATENT' and what appears to be a dragon head are inscribed on the back side of the device.

Black metal funnel shaped device covered with black silk material and trimmed in leather. Flat wood backing on one side (appears to be broken off). Vulcanite eartip.

Brown vulcanite trumpet device with detachable earpiece. Long curved receptor opening and base.

Tarnished green metal trumpet device with large receptor. At the base of the receptor the earpiece section is soldered on but the majority of the earpiece appears to be missing.

Orange color of unknown material trumpet device. All one piece with 3 inch wide receptor opening.

Brown ebonite trumpet otophone device featuring a diaphragm section for the user to hold against their ear. Includes one box with lid. Lid contains instructions for use.

Black enameled trumpet device with a vulcanite ear tip. Device is small with the receptor being the largest component. There are three grooves inside the receptor.

Silver metal miniature trumpet device. Earpiece is adjustable with vulcanite eartip. The receptor is concave shaped with 29 holes allowing for sound waves to enter.

Black metal miniature trumpet device with curving earpiece. Receptor opening is 2 inches wide.

Black enameled brass miniature trumpet with oversized receptor section in proportion to the earpiece section. Eartip is made of metal.

Black metal miniature trumpet device with long receptor opening and curved earpiece section folded against the receptor section.