Waterworks (4): the sand filter building – filter aeration
The sound was recorded in the course of aerating the sand filter. Water from the settling tank where most suspended matter was…
Stone frame saw – limestone
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02:02
About the sound
It takes two days to saw through the block of limestone.
The saw blades have no teeth. Sand and water is sprayed on top over the blade and lies between the stone and the blade and the friction makes the blades to saw through the stone
The limestone frame saw is charged Monday, Wednesday and Friday
Sound level: 90-93 Db, measured from two meters
The machine was built by a local firm in Borghamn, Holmqvist's mechanical, the local blacksmith. The frame saw was built 1951
Recorded at Borghamns Stenförädling AB, Borghamn, a family business founded in 1951.
The company is quarrying limestone and Kolmården marble.
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