Precision sound level meter No. 2203 made by Brüel & Kjoer, Bremen. This sound level meter was one of the first measuring devices of its kind. It was used to measure noise pollution levels in underground operations.
Details
Title: Sound level meter
Creator: Saarländisches Bergbaumuseum Bexbach, Staatskanzlei des Saarlandes Open Gallery
Subject Keywords: Das Erbe Kapitel 16 – Leib und Leben
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