Sn iso 8253-3

Ask for rush delivery. Most backordered items can be rushed in from the publisher in as little as 24 hours. Some rush fees may apply. Add to Cart. In order to ensure minimum requirements of precision and comparability between different test procedures including speech recognition tests in different languages, this part of ISO specifies requirements for the composition, validation and evaluation of speech test materials, and the realization of speech recognition tests.

This part of ISO does not specify the contents of the speech material because of the variety of languages. Furthermore, this part of ISO also specifies the determination of reference values and fulfilment requirements for the realization and manner of presentation. This part of ISO specifies procedures and requirements for speech audiometry with the recorded test material being presented by air conduction through an earphone, or from a loudspeaker for sound field audiometry. Methods for using noise either for masking the non-test ear or as a competing sound are described.

Some test subjects, for example children, can require amended test procedures not specified in this part of ISO Specialized tests such as those used for evaluating directional hearing and dichotic hearing are outside the scope of this part of ISO Complementary Documents and Links:. Active, Most Current Currently Viewing. ISO Complete Document. Browse Publishers.

Top Sellers. New Releases. Life cycle Previously Withdrawn. Final text received or FDIS registered for formal approval. Proof sent to secretariat or FDIS ballot initiated: 8 weeks. Close of voting. Proof returned by secretariat. International Standard under systematic review. Under development. Got a question?

Customer care. ISO specifies procedures and requirements for pure-tone air conduction and bone conduction threshold audiometry. For screening purposes, only pure-tone air conduction audiometric test methods are specified. It is possible that the procedures are not appropriate for special populations, e.

ISO does not cover audiometric procedures to be carried out at levels above the hearing threshold levels of the subjects. Procedures and requirements for speech audiometry, electrophysiological audiometry, and where loudspeakers are used as a sound source are not specified. Proof returned by secretariat 60 Publication Check out our FAQs.

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