Abstract: A "U" shaped yoke for retaining a pair of ear couplers to the ears of an individual at a minimum effective pressure in an acoustic system. A pair of right-angle horns carry the ear couplers and are rotatively mounted at the extremities of the U to allow optimum adjustment of the couplers to the ears of the wearer. The structure is assembled without adhesive and may be disassembled.

Abstract: The present invention relates to stethoscopes of the type commonly employed by air line passengers for use with entertaining sound apparatus and is concerned primarily with a stethoscope which may be adjusted for comfort when applied to and suspended from the ear canals of an air line passenger.

Abstract: This disclosure describes an acoustic ear mold insertable into the ear of an individual with impaired hearing and used in conjunction with a hearing aid. Inserted into the molded portion of the ear mold is a central thin-walled metal tube surrounded by a larger thin-walled metal tube, with annular end plates defining a closed resonance chamber. There is an opening through the wall of the central tube forming a path between the space inside the central tube and the annular chamber. Sound energy from the hearing aid is conducted to the ear mold through the central tube where it is reinforced by resonance in the annular chamber before passing on to the ear of the user.

Abstract: An earpiece which takes the form of a pouch made of a plastics foil which surrounds a less pliant plastics tube in an airtight manner and is filled with a sluggishly moving jelly-like paste.A not readily movable compression ring provided with a funnel shaped portion which is clear of the tube ensures that the pouch is filled in such a way that during use the pouch perfectly engages with the inner wall of the auditory canal.

Abstract: The described headsets have earpieces at the ends of acoustic tubing, the tubes being shaped about the wearer's head by a resilient frame that biases the earpieces against the wearer's outer ears. Pairs of spaced-apart strips form resilient arms of the frame and provide inner and outer guides for the acoustic tubes. The inner and outer strips are cross-connected to accommodate flexing of the frame without developing either localized stresses in the strips or significant spreading of the strips when separation of the arms is increased for putting on the headset and while it is worn.

Abstract: Acoustic headsets, especially for transmitting sound from stereo transducers to the listener's ears, include two tubes, earpieces at first ends of the tubes, and a frame for constraining the tubes into a convenient U-shape near the wearer's face. The headset has resilient arms at the sides of the U-shaped frame, and more particularly, the arms have resilient inner and outer strips along respective ones of said tubes, facing toward and away from the center line of the frame. The strips are interconnected at their extremities, and in the exemplary embodiment the inner and outer strips of each arm are interconnected by a bridge between the extremities of the strips.

Abstract: An earpiece having a tubular hub for receiving a sound-transmitting tube has a flange on an end of the hub about a central passage, comprising radiating ribs which are mutually separated by radiating slots or by webs. More particularly, the webs slope and the ribs adjoining the slots have marginal webs that are staggered in relation to each other, all as viewed in circular cross-section centered about the central passage. Still further, a tubular projection extends the central passage beyond the flange.