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Description: | Audiometry equipment c. 1970 comprising: delayed side tone autiometer, mk2, by Brenell. Pitch discrimination audiometer, mk2. Beat frequency oscillator by Brunel & Kjoer, Copenhagen. Noise average meter by C.E.L. Recorder/Player by Leevers-Rich. Condenser microphone by Bruel & Kjoer. Electronic voltmeter type 2409 by Bruel & Kjoer. Noise dosimeter type 122 by C.E.L. Microphone amplifier 2601. Level recorder by Bruel & Kjoer | License: | http://creativecommons.org/licenses/by-nc-sa/2.5/ | Source: | Science Museum | Creator: | Bruel and Kjaer (maker) | Identifier: | 1982-750 | Go to resource |
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