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Description: | Precision sound level meter type 2209 serial no.595204, fitted with half-inch condenser microphone type 4163 serial no.580386, made in Denmark by Bruel & Kjaer, Copenhagen, nominal range 20db to 140dB on rotary switch and -10db to +10db on meter, complete with windshield, flexible extension rod type UA0196, and box for microphone | License: | http://creativecommons.org/licenses/by-nc-sa/2.5/ | Subjects: | sound-level meter | Temporal: | 1960-1979 | Source: | Science Museum | Creator: | Brueel & Kjaer Vibro GmbH | Identifier: | http://collectionsonline.nmsi.ac.uk/grab... | Go to resource |
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