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Standards BS - British national standards - Page 6391
BSi – The company, BSI British Standards, is a national standards body of the United Kingdom (NBS) and it was actually the very first one in the world. It represents national and social interests of Great Britain in all European and international standardization organizations and in the development of business information of British institutions of all sizes and sectors. BSI British Standards cooperates with manufacturing and service industries, various companies, the government and with consumers as well in order to facilitate the production of British, European and international standards. A part of BSI Group, BSI British Standards, works closely with the government of the United Kingdom, especially in the Department for Innovations, Universities and Skills (DIUS).
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BS 2496:1968
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Specification for preferred sizes of casting pit refractories.
WITHDRAWN published on 18.10.1968
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BS 2497-1:1968
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Specification for a reference zero for the calibration of pure-tone audiometers. Data for earphone coupler combinations maintained at certain standardizing laboratories.
WITHDRAWN published on 20.9.1968
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BS 2497-2:1969
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Specification for a reference zero for the calibration of pure-tone audiometers. Data for certain earphones used in commercial practice.
WITHDRAWN published on 10.3.1971
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BS 2497-3:1972
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Specification for a reference zero for the calibration of pure-tone audiometers. Data for a wide-band artificial ear complying with BS 4669.
WITHDRAWN published on 28.6.1972
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BS 2497-4:1972
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Specification for a reference zero for the calibration of pure-tone audiometers. Normal threshold of hearing for pure tones by bone conduction.
WITHDRAWN published on 25.7.1972
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BS 2497-5:1988
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Standard reference zero for the calibration of pure tone air conduction audiometers. Specification for a standard reference zero using an acoustic coupler complying with BS 4668.
WITHDRAWN published on 29.2.1988
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BS 2497-6:1988
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Acoustics. Reference zero for the calibration of audiometric equipment. Specification for a standard reference zero using an artificial ear complying with BS 4669.
WITHDRAWN published on 29.2.1988
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BS 2497-7:1988
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Standard reference zero for the calibration of pure tone air conduction audiometers. Specification for a standard reference zero at frequencies intermediate between those given in Parts 5 and 6 of BS 2497.
WITHDRAWN published on 29.2.1988
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BS 2497:1954
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The normal threshold of hearing for pure tones by earphone listening.
WITHDRAWN published on 30.7.1954
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BS 2498:1954
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Recommendations for ascertaining and expressing the performance of loudspeakers by objective measurements.
WITHDRAWN published on 1.1.1954
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