Precision sound level meter, 1960-1979.

 
Precision sound level meter, 1960-1979.
4 0 c m
 
34cm
actual image size: 26cm x 32cm

Description

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.

Image Details

Image Ref.
 
10319557

© Science Museum / Science & Society Picture Library

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