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Precision sound level meter, 1960-1979.

Precision sound level meter, 1960-1979.
4 0 c m
actual image size: 26cm x 32cm


Sound level meter, type 2203, fitted with a one inch condenser microphone. Nominal range 10 decibels to 130 decibels. Complete with wind shield, flexible extension road and box for microphone. Made by Bruel and Kjaer in Copenhagen, Denmark.

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© Science Museum / Science & Society Picture Library

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