lured to their deaths by the sirens' song. In 1907, the German company Ohropax, which would produce mainly wax earplugs, was started by the German inventor...

circuit board by Albert Hanson of Berlin 1907: Earplug by Max Negwer (Ohropax) 1907: Pigeon photography by Julius Neubronner 1920s: Small format camera...

Earplugs made by the firm Ohropax GmbHA are well-known product from Wehrheim, marketed under the name Ohropax. Heraeus Medical, a division of Heraeus...