ISO 10996:1999

This International Standard specifies the means to determine, declare and verify the noise emission characteristics (sound power level and emission sound pressure level at the work station) of still-picture projectors. It specifies noise measurement methods and the operating and mounting conditions that shall be used for the test. The use of this International Standard ensures the reproducibility of the determination of the noise emission characteristics within specified limits determined by the grade of accuracy of the basic noise measurement method used. Noise measurement methods allowed by this International Standard are engineering methods (grade 2) and survey methods (grade 3). The engineering grade of accuracy (grade 2) is preferred and is applicable, for example, to type tests or for declaration and comparison purposes. The survey grade of accuracy (grade 3) is applicable, for example, to quality control purposes during manufacture. Survey methods usually enable measurements to be made in work rooms.