Automatic telephone Iskra Eta 80 – ringing
The Iskra Eta 80 was first presented at Ljubljana's Electronics Fair in 1978 under the name of Olimpik. It was the work…

In December 2018 Prosper Haniel, the last active coal mine of the Ruhr area, was closed down. Before the end “Sounds of Changes”-project worker Konrad Gutkowski had a last chance to document its disappearing sounds.
The coal mine in Bottrop was founded in 1856. Regular mining began in 1863 with about 60.000 tons of coal per year. Until 2016 it reached a depth of 1240 metres and mined 1.8 Million tons of coal per year. During the “Wirtschaftswunder” in the 1950s up to 12.000 coal miners worked at Prosper Haniel. Structural change and the decline of coal mining began in the late 1960s. Due to high production costs in Germany coal has been increasingly imported from China, India and the USA. One after the other the coal mines in the Ruhr area were closed down.
Not only are coal and stones transported within a coal mine, but also the miners and their working equipment are travelling to and from the various sites of work. The suspended monorail is one of the means of transportation available underground. The one in this recording is run by a chuffing diesel engine. The recording was made during a ride on the suspended monorail.
Sound: Jens Meißburger
Photo: Jochen Balke (Sirius Images)
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