Brüel & Kjær 2304 level recorder (3)
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Date of production: 1950s
This picture shows the measuring device Type 2304 produced by the Danish company Brüel & Kjær.
This photograph was taken by Nikita Braguinski at the Audio Communication Group, Technische Universität Berlin, in May 2018. The use of the device is demonstrated in the accompanying video.
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From the series
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Audio Communication Group, Technische Universität Berlin
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CC-BY Users may share and adapt this material, even for commercial purposes. Appropriate credit must be given and an indication included if changes were made
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Nikita Braguinski