Curved transparent hollow tube made of flexible clear plastic, designed as part of the Telefunken PE-484 earphone assembly. The tube forms an inverted U-shape, open at both ends, and was likely intended to connect the earphone receivers (2020.645.018) to the operator’s ears, serving as a sound-conducting or insulating channel.
This configuration was typical in German WWII communications headsets, where such tubing minimized electrical interference and improved hygiene and comfort for field operators wearing helmets or communication headgear.