Precision sound level meter
- Brüel & Kjær (Sound and Vibration Measurement) A/S
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
- Object Number:
- sound-level meter
- furnishing and equipment
- measuring device - instrument
- Civil Aviation Authority. Chief Scientis
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