2009UNE-EN ISO 11689:1997/AC:2009 Acoustics - Procedure for the comparison of noise-emission data for machinery and equipment (ISO 11689:1996/Cor 1:2007)
1997UNE-EN ISO 11689:1997 ACOUSTICS. PROCEDURE FOR THE COMPARISON OF NOISE-EMISSION DATA FOR MACHINERY AND EQUIPMENT. (ISO 11689:1996).