In May and June 1900, Valdemar Poulsen experimented with different materials for the wire and cylinders, speeds, and magnetic heads in Mix & Genest’s Berlin laboratories to make magnetic recording technology marketable. To improve volume and intelligibility, this device uses a wide steel band instead of wire. In June 1900, Mix & Genest showcased it at the Paris World Expo, with demonstrations for invited participants and press representatives.
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