Abstract
FOR many years it has been customary to test the efficiency of telephone receivers and micro-phones by comprisons against instruments selected as standards. The international committee on long-distance telephony has now,spified a standard which is baon scientifi, priciples) The European master stanrd will be kept in a special laboratory in Paris and will be available to any European administration or manufacturer tandardising instruments. The apparatus will als e available for researches on telephone phonetics, such as, for example, the comparative articulation efficiencies of the European languages.
Article PDF
Rights and permissions
About this article
Cite this article
Standardisation of Telephone Apparatus. Nature 120, 785 (1927). https://doi.org/10.1038/120785a0
Issue Date:
DOI: https://doi.org/10.1038/120785a0