scope:

In order to ensure minimum requirements of precision and comparability between different test

requirements for the composition, validation and evaluation of speech test materials, and the realization of speech recognition tests. This part of ISO 8253 does not specify the contents of the speech material because of the variety of languages.

requirements for the realization and manner of presentation.

test material being presented by air conduction through an earphone, or from a loudspeaker for sound

are described.

part of ISO 8253.

Specialized tests such as those used for evaluating directional hearing and dichotic hearing are outside the scope of this part of ISO 8253.