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Description: This decible testing equipment may have been used in the telecommunications industry by a company such as British Telecom. The tone wheel on the object suggests it would be used as part of an audio transistion test set, generating musical 'test tones' to ensure sound is being correctly transmitted. Source: Tyne & Wear Archives & Museums Identifier: emu.ecatalogue.science&industry.515173 Go to resource More Like this...
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