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STC portable sound level meter

STC portable sound level meter

1934

Integrating sound level meter by Cirrus Research Ltd.

Integrating sound level meter by Cirrus Research Ltd.

1984-1996

Portable Audio Level Meter

Portable Audio Level Meter

Precision sound level meter type 2209 serial no.595204

Precision sound level meter type 2209 serial no.595204

1960-1979

BBC ME16/3 Sound Level Meter

BBC ME16/3 Sound Level Meter

1975

Sound level meter type 1400G by Dawe Instruments Ltd., England, measuring in the range -6 to +10dB

Sound level meter type 1400G by Dawe Instruments Ltd.

1965-1979

Precision integrating sound level meter type 2218 with microphone and preamplifier type UA 0196, pistonphone sound source type 4220, all by Bruel and Kjaer, Denmark, and with extension cable, all in fitted carrying case

Precision integrating sound level meter type 2218 with microphone and preamplifier type UA 0196

1975-1979

Precision sound level meter type 2203 serial no.105252, fitted with one-inch condenser microphone type 4145 serial no.436055, made in Denmark by Bruel & Kjaer, Copenhagen, nominal range 10dB to 130dB on rotary switch and -10db to +10db on meter (glass of meter dial cracked)

Precision sound level meter type 2203 serial no.105252

1960-1979