The sewage treatment plant (14): sludge heating
Sounds recorded in the building with heat exchangers which heat the sludge to a temperature of about 38oC. Heated sludge goes to…
Typewriter Optima M12 – inserting paper
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About the sound
Sound of inserting paper into the typewriter Optima M12.
It is a type-bar typewriter classic for the mid-twentieth century. The typewriter’s platen is 34 centimetres long and therefore it allowes to type on A3 paper. The keyboard has the QWERTZ layout and includes Polish language specific characters.
It was manufactured by VEB Olympia Büromaschinenwerk Erfurt in 1960s and widely used in Polish offices. History of the company dates back to 1862 when it was established as Koniglich Preussischen Gewehrfabrik.
Manufactured by VEB Olympia Büromaschinenwerk Erfurt, Germany (GDR)
Sound level: 62 dB
Sound recordist: Jagna Firek
Photographer: Amadeusz Ferduła
Video recordist: Michał Dobrucki
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